The bulk of the software you literally just used to post that comment and get it to my eyeballs was open source. What on earth are you on about? The idea that all software is immediately-visible UX should have died in the 80's. It wasn't even true then, but it was closer to true. Now, it's basically laughable.

Open source will do just fine whether you know it's there or not. It's been a "mainstream thing" for decades. The war you imagine was won, long ago.