The difference is that you can, quite successfully, keep "cheating" with an LLM while at a job. And people do, not just in lower-importance roles, but at law offices, etc.

I work in tech and I see this more and more every day. By "cheating", I mean deciding that you don't want to do the thinking or even spot-check the result; you just ask an LLM to vibe-write a design doc, send it out, and have others point out issues if they care.

Your very last point though is where it all falls apart. If you have people who know what they're doing, co-mingled with "LLM cheaters", its very obvious they're cheating. Before long, they're found out and fired. It's not sustainable.