Those two are not good examples for “finishing the degree isn’t as automatically important as it once was”. First, they both founded their companies around 1975, at the very beginning of the personal computer world. There weren’t degrees in computer science back then, and as far as I can tell, neither one of them ever worked for a different company -lack of a degree is less of a hindrance when you are starting your own business than when you are looking for a job with an existing company. Second, in 1975 around 18% of men and 11% of women had a 4 year degree - in 2019 it was around 35% for each gender. Even if you were looking for a job in 1975, most of your competition didn’t have a degree either. And lots of jobs that want degrees now didn’t require one in 1975.
As far as taking a year off- it can go either way. She might decide that working at Goodwill for minimum wage for the rest of her life is such a horrible future that she goes back just as soon as she can. ( That’s what happened to my son after a semester off working at Toys R US) She might find a more interesting, better paying job and deciding going back to school for the bachelor’s/MLS isn’t worth it. ( which is what happened when the same son got a good job right before he finished an associate’s - he finished the associates but didn’t go further) There’s of course also a chance that she’ll decide working at Goodwill or some other minimum wage job for the rest of her life isn’t so bad - but you would probably know if that was a possibility.