I would not leave it to junior developers to ask the right questions.
In my experience, from a few juniors I've cooperated with, they get absolutely awful code from ChatGPT. Things like manual opening and closing of files with unnecessary exception handling that crudely reimplements stuff that's already in the standard library and should have been a one-liner, and sure, ChatGPT will happily suggest explanatory comments and whatnot, but it's like copying in material from a reference manual, i.e. provocatively useless.
To me it also seems like they don't learn much from it either. They've made much more progress from a bit of mentoring and heavy use of REPL:s and similar shells.
In my experience, from a few juniors I've cooperated with, they get absolutely awful code from ChatGPT. Things like manual opening and closing of files with unnecessary exception handling that crudely reimplements stuff that's already in the standard library and should have been a one-liner, and sure, ChatGPT will happily suggest explanatory comments and whatnot, but it's like copying in material from a reference manual, i.e. provocatively useless.
To me it also seems like they don't learn much from it either. They've made much more progress from a bit of mentoring and heavy use of REPL:s and similar shells.