Because they can make more money without it. There is an obvious huge push to get into the corporate space with this by meta, and corporations will not abide by ads for shit they pay for. And more seriously, they will have hard contractual and legal requirements to not be surveilled.

thats not what leaving it on the table means. Apple shows you ads on their devices and services, they just gatekeep third parties like facebook. Any devices and services facebook makes absolutely would be vehicles for ads just like apple.

There's no reason for there to be any difference. Pretending any company is going to leave the money on the table for non existent good will is wishful thinking. No one will trust them regardless.