The accommodations are other life skills that they are lacking in. I think oral examinations would really highlight weak points for a lot of people and they would seek exemptions that are easier.
I'm not saying that you don't assist people with learning, but I think testing and learning are two different beasts. I think having a uniform standard for testing is a good thing, I'm all for oral examinations or proctored written tests, but I worry about all of the people that will seek exemptions from it because they can't perform to the same standards on those tasks. It's degrading to the letter grade of everyone else.
I do think that it is the responsibility of every student to study and find resources that best fit their learning style.