Or usability of this feature would be so frustrating, that no one will use. Constant security popups on every start, very limited available API for apps, etc...
Recently I've noticed more sites providing a visible "Deny All" button, rather than the dark pattern of going through and unchecking 5, 10, 50 tracking cookies individually, or having to dig out a button hidden somewhere.
I assume this was how it was intended to function, but the kind people that run internet websites intentionally made it more difficult.