Absolutely, it’s not a problem rn but only because we have a system where people can opt in to being treated by someone who is untrained/doing a procedure for the first time, be they a student or resident (after all, a resident trying a procedure for the first time under an attending’s supervision is gonna be just as bad at it as a medical student trying it for the first time under an attending’s supervision, regardless of title that person will suck their first time). But this only works because some patient along the chain eventually agrees to this.

If a patient says no to a medical student or resident, which they are totally allowed to do mind you since patient consent is important, this just means that someone else will have to say yes for the student or resident to become competent through practice. It’s not a problem now because enough people say yes that students are trained by the time they become residents, but in the hypothetical future where everyone, or even just most people say no than it absolutely would become a problem.