A lot of people spend most of their waking hours having to deal with or at least keep in mind the fall out from regressive politics. Asking people to not discuss politics is like asking someone living in fear for their safety to not try and improve said safety. You're asking to not have to be bothered by something that annoys you to talk about in exchange for someone not being able to advocate for their life and livelihood.
Somewhere along the way we lost that idea, not all cultural changes are for the better.