It’s standard practice in Grad school AFAIK. My class has to do it too, and our Prof stuttered, and is one of the “big names” in the field. Heck we even did it in a class during Undergrad. It’s not a perfect experience, but it’s a small window into the reactions we get while out in public. During my AAC class I had to use…I forget which app, but I had to go out of the house and use a phone-based AAC app. It wasn’t fun, or easy, but it gave me a good insight. This is the same thing.