Regulatory capture. If the handling of user messages requires constant scanning and there are enough rules that you need a team of lawyers, then only Google, Meta and Apple will be able to afford it.
It's briliant really... instead of trying to dismantle privacy regulations you push for new regulation that overrides them and make data mining users even mandatory.
In any case the OP claimed "Apple is wholly against Chat Control." i don't think it's so wholly if Apple financially supports biggest pro Chat Control proponents. Even if Apple is aware of it or not.
If the laws are designed to directly benefit it makes sense like with the FAA allowing Boeing to self regulate to the point of killing a few hundred people. This feels more like bureaucratic capture or some other name, where the entity must be so large to interact.
It has the same effect and you are not wrong, I just wish it was clearer.