Not all people, not even all programmers, sign specific agreements. I have taken programming jobs only signing tax documents.
EDIT - I also wouldn't expect something as flimsy as a piece of paper to actually protect me my the likes of Steve Kalanick. He seems like the type to screw anyone over if he can gain from it. If I were those programmers I would get a laywer no matter what any agreement said.
For the future, please consider that starting a post with "Wrong" is not polite and not conducive to meaningful discussion. It also doesn't make you any more or less correct.
If you must downvote me, please leave a comment and tell me why. If you don't tell me why, I must presume it is because my line of reasoning was correct, but hurt your feelings .