The corrollary is that pushing Linux usage rate won’t happen through installer improvements but through politics and having access to preinstalled Linux.

That’s not most people no. That’s a tiny number of people.

Don’t get me wrong. Making the installation easier is a good thing. But thinking it will change anything to the usage rate of Linux is naive.

Most people do not install any OS and they will never do. Ever.

Installing Linux is not hard already. The single barrier is partitioning. Well, at least when everything works. Secure boot is also a barrier, as are bios configured to NOT boot on a USB key by default. Or Windows with its fast boot making accessing the bios and booting on devices harder.

If you want to consider people who want to try to install Linux without experience, there are a dozen of barriers, and the installer is not the biggest one, far from it.

The installation is irrelevant to the use of Linux. The vast majority of people never installed Windows. And they never will.