Holy crap, I've experienced this and never made the connection before but it makes so much more sense now in that context. I pretty much completely dropped my hobbies (reading, art, language learning, translation) during vet school and, even after leaving, I had a really difficult time getting back into them. Part of it I think was mental health related, but another part of it was because those things just felt so slow and not as mentally engaging to me anymore. Movies are really hard, too, and it's rare that I watch one all the way straight through these days. I could never put my finger on why I felt that way, and still do to an extent, but I'm finally starting to gradually immerse myself in those hobbies again.
Though it's kind of funny, because I don't even know that I ever really successfully "adapted" to the horrific levels of cramming and regurgitation of mass amounts of information that is required in vet school (if my GPA was any indication).