Politics is not a game or a religious belief. It is a literal matter of life and death for millions of people who have very little power. (Hint: not tech workers.)
Ethical values impacts literal matter of life and death for millions of people. This is true. Ethical values differs also from people to people and is a deeply aspect of personal identity. As such, challenging coworkers on a political level also means challenging coworkers personal identity, and that just something which the workplace is poorly designed for.
Your work is directly linked with exploitation and oppression of people around the world, in almost every industry. The tech industry is directly linked to child slavery in the Congo, mining Cobalt for hardware. And tech players have a big role in worker's rights in the US too, think about Uber drivers. There's every reason why tech workers should use their united power to do something about these issues.