It’s not a moot point because unless people are explicitly looking for a Linux pre-installed PC, every pre built computer/laptop has a pre installed OS. If people are building their own PC, then there is a very high chance they know how to install a OS.

You don’t need to know how to install a OS on a fresh pre built system when it is already installed. Again, why bring up Anriod OS? It comes pre-installed, and 99% of people will use the same OS and let Andriod maintain itself, infact, unlike computers, changing or modifying your Andriod OS most likely will result in warranty being revoked, and on top of that, changing your OS/bootloader on andriod is MUCH harder then installing Windows. I’d even say it’s harder then installing most Linux distros.