The truth is very often that it is long and hard not to do the work to comply but how to not comply or do complicated things to abuse of loophole despite being able to pass the law on the letter of it.

Especially in the case of apple or Google. Look at the app store situation. It is very straightforward to do the work for the whole thing to be open to any competitor. But it is hard to try to design and implement a solution to try to not break any regulations but still manage to keep users captive the maximum without having competitor entering our walled garden.