The problem is we're looking at it as techies. Most people want to check their emails and browse the internet. That's it. They don't care about anything after that.

They don't care about privacy or customisability or configuration. They want to push buttons and it does what they want.

Linux is not like that. There are too many choices all of which are basically the same to an average user. So they won't bother.

Why use a system that supports a sub set of your games and requires configuration and choices when you can just push a button and double click an icon.

There's almost no gain for the average user and a lot of drawbacks.