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.
This isn't true. It's far more secure to lock the boot loader and block root than it is to leave them open. This is a basic security measure from the OEM. They didn't just wake up yesterday and go "let's mess with those nerds."