> but it's entirely against their interests to have it default to off.

It's been a long while since I've seen a cookie banner, but I always understood the law as that the user has to explicitly do something to opt-in which is why the customize options default to off and the "accept all" button is usually made the prevalent option instead. Not sure displaying non-essentials all default to on would really be in compliance, but to be honest I'm not sure anyone really cares enough about all of this anyways or the law would have been amended by now to block this kind of crap.

Just for fun I disabled my blocker to see the atrocity. They hid the "real" customize your choice in the bottom left, and (if you can ever find it) it's one of the better. The buttons do seem to be left is disabled/right is enabled on both pages. An impressive amount of work went into making this one as complex and confusing as can be, they should enter a competition!