It’s not only about many people here being technical, of course you’re right that it plays a big part, and it’s also that the Fediverse is a rejection of for-profit, closed social media, so there’s a HUGE crossover between its users and the FOSS community (including Linux users) who really take strong issue to many things about Windows (and Mac) that Windows users consider to be normal. And with Lemmy especially, the initial userbase was largely anti-capitalists, since Reddit was banning many of their subreddits and was exploiting their users for profit with ads, blocking third-party apps, and bending to the demands of media companies and their owners. So plenty of people here are political about software.