It is much harder to explain to consumers why Apple should get a percentage-based rent (sorry Core Technology Fee that enables Privacy and Security™) if they go to a non-Apple website, download a non-Apple app, to do non-Apple-related things.
Like literally the only participants in that business transaction are the consumer and the company, Apple does not even enter the picture.
It would be like car manufacturers charging you a percentage for going to the grocery store, because they provide a Private and Secure™ transportation platform.
Consumers will soon catch up, and if the EU does not put pressure on Apple about this, they definitely will.