Oh yeah, I'm pretty worried about that from what I've seen in biochemistry undergraduate students. I was already concerned about how little structured support in writing science students receive, and I'm seeing a lot of over reliance on chatGPT.

With emails and the like, I find that I struggle with the pressure of a blank page/screen, so rewriting a mediocre draft is immensely helpful, but that strategy is only viable if you're prepared to go in and do some heavy editing. If it were a case of people honing their editing skills, then that might not be so bad, but I have been seeing lots of output that has the unmistakable chatGPT tone.

In short, I think it is definitely "grumpy old man" thinking, but that doesn't mean it's not valid (I say this as someone who is probably too young to be a grumpy old crone yet)