When I see politics in software updates or documentation, nothing happens because I'm not looking to use the software for political activism. Maybe I tell my adblocker to remove the messaging, and carry on with my task.
I can engage with politics in a social context, when political messaging isn't interrupting something else I'm doing; that's a better place for activism, IMHO.
I almost always see activists using the argument that if I don't like the messaging then I'm part of the problem. Somehow I doubt that, given I don't mind messaging at all, where it's appropriate.
I see this as a bad analogy though: you wouldn't hear about it every time you go to the grocery store. Or, at the very least, you wouldn't stop and listen for the fifth time. You already know, and that's the point: the intention of most activism in technology (at least that I see) is to make you initially aware of it so you start to seek the information out and learn more elsewhere. (...And to give themselves good PR. We love rainbow capitalism /s)
Instagram and Twitter both get your attention during election season because they want you to be informed about how to vote. To me, that's a similar thing.