Installing Linux is not a user problem. Most users wouldn't be able to install windows. You will never have users easily partition a computer, especially if you want to keep data. Even most people working with computers wouldn't be able to that!
You're gravely misunderstanding what users need. If a computer is pre-installed and working, 90% of the problems are solved already. The actual problems are 1) to not break the system with an update, and this on two computers I updated once a year it didn't happen for 5 years ; 2) have the softwares working
is the big part : people will moan about not having office, but office365 is a thing and you can tell them to deal with it. Video games are the next big part, and with proton it's almost as smooth as it could get
You hit the nail on the head about telemetry. Every program that asks me to share crash reports I always turn it on. That's just too useful for them to worry about some ideological puritanism about "privacy".