the average person doesn’t know what a bootloader, adb, fastboot etc is

Yeah. Even if one knows - why bother the hustle? If it were that easy as a desktop PC, boot from USB and you have anything you want, that'd be great. But instead, you have to make 63 hacks to get out of the default.

Fully agree with your post. PostmarketOS offering is a welcome wish on Fairphone. And here I am wishing to have Mobian :D