I agree with jkl, computers are tools. I don't mind using proprietary software, but only after I try to find (or create) a free alternative that fits the bill. Evaluation of free choices is important, for instance I agree with jkl's assessment of systemd and as such avoid it on my Linux machine.

Another one that makes it tough is family/friends and interfacing with them. My goto example is that I gave up trying to convince my friends to use Matrix/Riot and joined them on Discord. I'll be the first to grumble about "proprietary this" and "user tracking that" but sometimes you have to make the efficient choice. Then again, I refuse to use social media so there's some balance the other way. I guess everyone is a bit hypocritical :)

I'm sure rms would club me with a chair for that opinion, but to each their own.