Earlier quoted context omitted.
You can vote, run for office, petition, volunteer, protest,etc to the local, state, and federal government to have policies that reflect your values. The only thing you can do with Uber is use it or not. Maybe you could write Uber a letter. You have a say in government - that is its stated goal and purpose. Of the people for the people.
The 'say' you have in government is much smaller than the 'say' you have in using Uber. I can choose not to use Uber any time I please. I can not choose not to be pulled over for speeding, or opt out of murder laws temporarily. The fact that you don't have a say in Uber's corporate decisions is irrelevant, because you can simply stop using it. You don't need a say. The fact that you can't opt out of government is why…
Sure you can. Just leave their jurisdiction. I've heard Somalia is nice.