Since Apple has moved onto arm, they don't need to lock it down, at least yet, because Windows is a no-go on arm, and it's slowly becoming AI slop anyway. There's only Linux but then if they locked the bootloader down they would distance themselves from the competition. And people do write drivers for macs.

Meanwhile jailbreaking iOS or iPadOS has more use than doing anything you want on macOS. For example removing ads on Spotify, YT or running cracked apps or ebooks. Yes, you can do the same on macs, but you do not keep a Mac in your pocket.

However if iPads and MacBooks become one thing, I'm pretty sure they're still be more restrictions.