I'd be interested to know what methods you would use to institute such a baseline.
The same that I had in both civilian and military primary flight training. FTI, SOP, lectures, simulators. It is not only theoretically possible, it actually happens.
IMO and experience, a student taught with a script baseline tends to think aviation actually is scripted, and much effort is required to have them internalize that it isn’t. That’s a general statement and I understand we can find outliers.
One negative consequence I’ve seen of scripted students compared to ones that aren’t is paying lip service to checklists. Just reciting things as done, rather than actually doing those things (or worse, not realizing that doing those things is actually important). I’ve seen many many students have the mindset that if I say it (because it’s on the script) the intent was satisfied. That is obviously really bad but still correctable. However, this could’ve been alleviated from the start. Again, just one example I’ve seen. There are others.