This is the biggest "generational divider" I see rapidly creeping up over the last 5-10 years: People want "The Bag" but don't want to put in the effort to get it. They think the journey and the effort to get there is just in the way, and once they get their Bag, then they'll put in the effort. But it doesn't work that way. You can't flip on Effort like a switch if you've been half-assing things for a decade leading up to that.
Obviously, there are a lot of factors at play as to why the percentage acting that way are going up: K-12 schooling being mostly concerned with keeping grades up to retain funding so they pass everyone, abolishment of ACT/SAT scores for college entry as mentioned in this story, being distracted by the over-use of mobile devices/laptops in class, overuse of AI now so they once again don't really understand the material, etc. Not to leave out: Feeling like society is rugpulling them, so why bother trying hard when you're going to end up unemployed or underemployed no matter what you do?
As for why they lean into AI: I don't think we should discount the general lack of tech literacy these days as a reason they fall into the AI landmine. Kids don't use technology so much as consume it. The knowledge has never been easier to find and learn how to understand tech, but most simply... don't. It's not uncommon to have students entering college that don't understand what a filesystem is and how to navigate it for saving files, etc. In which case it's no surprise they fall for AI when the AI companies go out of their way to call LLMs "intelligent".