Narrator's Narrator: "The overwhelming majority of consumers don't care about the bootloader, so the market forces do not have an incentive to keep it unlocked. This leads to the market not 'fixing itselt'. "

People are not and cannot be rational actors in the market owing to imperfect knowledge. Externalities are common.

This isn't the 'market not fixing itself'. This is the 'market being actively manipulated and enshittified'. Don't forget that it's much easier to leave the boot-loader unlockable or even unlockable by just the owner, than it is to keep it locked and under control of a remote corporation. They went out of their way to enshittify it.