The question was "Why doesn't everyone get this, if CA has it?"
Because they want it to be hard.
AMC’s movie ticket subscription service requires waiting for and chatting with an ostensibly human support agent in order to cancel a subscription. If that’s a real loophole in the CA law then they should obviously patch it.
Run it deliberately until someone complains, and then make a pro forma change. Run that cycle until someone actually passes a law or takes you to court in some fashion.