How much do engineers really have to do with the (bad) business of a company? Facebook has a high technical standard even if you question their societal impact, for Amazon I'd be concerned about the cliche backstabbing culture.
Disclaimer: I worked at Uber in the past
The others are regularly criticised to varying degrees, but that doesn’t mean it’s impossible to work there for people somewhat conscious of their conscience. It comes down to the question “can you honestly expect to have an impact on the organisation, or is it more likely to hollow you out and make you into another one of their cynical libertarian defenders?”
This happens to be exactly the same misunderstanding as calling all criticism “cancel culture”.