Well, partly it depends.
If there’s someone with massive burn scars or large areas of skin graft… I’m not sure I’d call it “disgusting”, but disturbing comes to mind, mostly because it’s an indication the person suffered some horrific and terribly painful accident. The same for missing fingers, toes, feet, hands, arms, legs… it isn’t so much the scar as the thought of the pain and suffering someone must have gone through to get it. Wouldn’t stop me from starting a conversation or anything like that, but yeah, I’d be curious. And I hope this makes sense - I wouldn’t think any less of the person, but I’d prefer it if things had been such that they wouldn’t have had to go through whatever it was.
Some surgical scars are interesting because my mind tries to figure out what they were for. There’s that distinctive “I’ve had heart surgery” scar down the breastbone, for instance. The “I’ve had a tracheostomy” scar in the hollow of the throat between the ends of the collar bones. And, yes, the quasi-circular “I’ve had a chest tube at some time in the past” scar. But that’s not to say I find them attractive.
And some scars - the little ones, the fine-line ones - just aren’t particularly noticable. Yeah, I see 'em, but don’t notice them unless they’re on the face or have some other unusual chracteristic (extreme length, perhaps, or completely encircle the neck or something).
Even scars on the face aren’t usually upsetting if they’re small and not humped-up keloids. I notice them, but’s like noticely any other facial feature - “Let’s see, ** Murcielago** has brown hair, brown eyes, slightly crooked nose, small scar on chin without beard stubble, big ears, skinny eyebrows, and crow’s feet”. Just sort of gets lost among the rest.
I’d say on a casual level, it probably doesn’t matter. In a formal setting long pants and sleeves would keep them from being distracting.
Due to a lot of surgery in younger years my husband has quite a collection of scars - I see 'em, but there was never any particular emotional impact (other than “oh, that’s too bad you had to go through all that surgery and I’m glad that part of your life is over”) and now they’re just part of the scenery. His one foot looks kinda gross, but that’s because it’s not a normal shape, not so much from the scars from surgery required to repair it to the extent it’s been “fixed”. If it was a more normal shape it’d be less disturbing even if there were more scars on it.
Also, he keeps it hidden all the time. He’s clearly uncomfortable with it. If your scars don’t bother you and you act like you’re comfortable with your body, others will likely be comfortable, too. Sometimes, when you try to hide something you wind up drawing more attention to it.