My brother (mid-20s) still writes in cursive. He does so beautifully, completely legibly, and rapidly, at a faster rate than he, or the average person, can write non-cursive.

What a useful skill for the 160 words a year the average person writes /s

He's not the average person. His handwriting ability is both an impressive and useful skill, considering that he takes notes in a notebook, and can do so rapidly. Besides, your claim was that "no-one" uses cursive, which I simply was chiming in to point out isn't true.

Aren’t you still required to write out a statement in cursive when you take the SAT?

For what possible purpose?

Basically promising you’re not cheating and your answers are your own.

I would normally expect that to just be a signature.

What happens if you simply print your statement like most people who need to write legibly do for the majority of their life?