Consoles being locked down serves the purpose of multiplayer games without (rampant) cheating.

I like to play some TF2 occasionally, but it's not even worth trying anymore. Most matched games are full of robots and when you get one that's not they get in on the next round and out vote actual players so they can't even be kicked out.

Steam isn't even trying to stop cheating, but especially since they've embraced linux there's not much they can even do about it. You need trusted hardware and software to do it.