I’m guessing for plot reasons they wanted him in the wheelchair, but archangel could heal people by mixing his blood with theirs. Didn’t any mutants have the ability to fix his spine?
He’s been cured multiple times, actually (in fact, I’ve not read X-books in a couple years, but last I did, he was walking).
I can’t find a list of the various ways he was healed, unfortunately.
Not just mutants. Marvel is filled with superscience and magic that should’ve fixed him with no problem.
One of the Morlocks is a healer. I think there was a plot point where he could heal Xavier once, but not twice. In the 80s, Shi’ar technology cloned the Professor and transferred his brain into the clone body. Ten years ago, Xorn-as-Magneto-as-Xorn used nanites to fraudulently and temporarily heal him. Currently, he is walking. Not sure how.
Xavier’s lumbar vertebrae is the Optimus Prime of the series. They keep dying and coming back to life over and over again.
I thought his paralysis was linked to his power? I recall him going to the Savage Land (?) where mutant powers are suppressed and he could walk again while there.
Unless they have a mutant who can shift a plot points across infinite writers and editors, the Professor is always going to land back in that chair. Perhaps she’d be called Meme-killer. Each span of plot architecture removed is balanced by the spontaneous creation of X number of LOLcats, with X being greater the more deeply the meme has been lodged into the collective readermind.
Pretty sure the Scarlet Witch could just change reality to one in which he isn’t paralysed (well, could have, he’s been walking again for a good few years now).
Elixir has healing abilities, but I’m actually not sure if he and Xavier ever actually met.
I noticed this about Hercules. He was introduced as a comedic character and despite the several excellent mini-series starring him, writers seem to return to the comedic version for no reason.
Only if they have the same blood type, IIRC.
After the Shi’ar cloned him and got him walking, the Shadow King broke his back, putting him back in a wheelchair. Stryfe’s techno virus struck him down, but when he healed from it, he was walkinga gain for a short time.
Yeesh. For all that, it might just be easier to stay in the chair.
“No, no, I can walk. It’s just that every time I do someone breaks my spine anyway. It’s just easier this way.”
DC comics once lampshaded this point as to Oracle, with the Martian Manhunter suggesting to her that with all their science, there ought to be some way of healing her. She declined; something about having adjusted to the challenges of her life in the chair.
During the time that he had the perfectly healthy clone body, he found he couldn’t walk because his mind wouldn’t let him. He was so used to being a paraplegic that he’d have crippling psychosomatic pain if he stood up. Somewhat embarrassing for one of the most powerful minds on Earth not to be able to control itself.
Because it’s more fun to write and read a comedic brute?
If you haven’t read “Incredible Herc” by Van Lente and Pak, I recommend it.
It’s a buddy adventure comedy starring Hercules and Amadeus Cho the 8th smartest person on the planet.
I find that a really strange turn of events for the reasons you said. Unless, on some level, he didn;t want to walk.
Probably for the reason given by Jophiel. If everyone thinks he’s still paralysed, maybe they won’t bother crippling him again. 
My son (who’s seven-and-a-half) and I talked about this kind of thing on a couple of occasions. It’s just a plot point and part of the characterization. There are any number of characters in the Marvel Universe that could have cured Professor X and, seeing as how he has Cerebro and the Lockheed at his disposal, it wouldn’t be that hard to locate them and fly himself - and his team, if the healer needed “convincing” - out there.
My first thought was Lionel Jeffries, younger brother of Madison Jeffries of Alpha Flight. He could easily heal the Professor, is a mutant (and thus detectable by Cerebro), located in nearby Canada, and was, before he went nuts, potentially friendly to the X-men.
It just wouldn’t do to have Professor X not in a wheelchair, though.
A similar question arose about Rogue’s soul-sucking power. She can’t and won’t touch anyone for fear of absorbing their personality and memory… except that there are other characters in the Marvel universe (including at least one of the Morlocks who was for a time quartered at the Xavier school!) who have the ability to nullify any mutant powers - including Rogue’s - in their proximity.
Rogue might be able find somebody with such a power that she’d be interested in (Cerebro sure does come in handy!), although that would certainly make her less of a tragic figure. Alternately, she could at least work out a double date with her chosen and the power-siphon and whomever he/she/it wanted to go out with.
Rogue’s had control of her powers now for a couple of years now.
I think this works as an in-universe and a “it’s just comics” answer-- it’s a positive message to send to people who don’t have access to magic and powers and tech–they can still be heroes.