Maybe some employees will be less likely to stick around, too.
It is unlikely that every employee gets their input valued. The game of favoritism is older than Amazon, even older than the written word. Usually, a small clique gets to the top and gets their input valued quite a lot - at the expense of everybody else. Some people are more talented in office politics than others.
For the "everybody else", it means either curry favour with the clique or get out.
The minority of conservatives in progressive cities on the West Coast are cheaper to replace than the majority of liberals, though. It's how the market works.
How is any of this abusive? It's a scenario where a minority of workers in a geographic area decide they no longer agree with their employer, and voluntarily quit. The market implies it's cheaper to replace them, because they're few, than it is to replace many workers.
Because it's not true. There is a glut of closeted libertarians in silicon valley. You can't just say it's a geographical issue. Pushing workers out the door for their political and moral beliefs is definitely abusive in a supposedly "free" society.
America is definitely not that anymore. What a joke.