I’m sure it’s not literally all of them, and it’s almost never preinstalled. But available in the repositories.
PC is overall more expensive, no doubt. But your point was incorrect.
Ubuntu has zero telemetry if you flick the switch they show you right after installation. And steam is proprietary software, yet basically every distro ships it in their repos. Your points make no sense.
That’s the radeon 6700 for base PS5, which currently costs 400€
But snaps do have shared dependencies to a degree. Also, do you use gentoo?