This is already the case for Master's degrees and above in Denmark. I've been the opponent examining students. We ask Master's students to give US instruction on a topic (drawn randomly on a card in front of them, from a list they know a few days in advance). They do a chalk and talk on a topic for about fifteen minutes with three to five professors being "dumb students". It works fantastically and at the end it's ve…
I can see this being a problem in the US when it comes to "accommodations" in general. Students with an ADHD diagnosis can claim it causes just about any difficulty and get accommodations for it. The local (top ranked, but everyone's seen all the stories coming out of the Ivies...) college here gives students with ADHD double time on exams and has them take it in a special disabilities proctoring center where it's a struggle to get the staff there to even enforce those time limits. Obviously this also makes it infinitely easier to outright cheat as well.
Not a chance you will get past the "my ADHD makes it hard for me to think about these things verbally" challenge at institutions like this.