Realistically the "average user" has better things to do than to install Ubuntu or another OS these days just to get work done. It's even better for Windows users thanks to WSL which gives them less of a reason to switch to a Linux distro or even to buy a Chromebook. Android is a good example of what the mess of the Linux distros should have been but for mobile.
> In the last 10 years? This is no longer a problem.
Well you brought up an anecdote about Windows as so did I for Linux. But as with both graphics cards and their drivers, this is still an eternal issue on the majority of Linux distros, especially those who keep using NVIDIA and Intel.
> The "average user" doesn't care. They want to read Facebook. See my previous comment.
Exactly. Why should the "average user" bother with all that trouble in switching/migrating if Windows / Mac users have everything Linux has to offer but with a sainer environment and established support and ecosystem.