> I’m not sure the benefit to Apple or other phone manufacturers. This looks like a substantial cost with zero benefit to those others than law enforcement.

The benefit is that law enforcement has access to relevant information. Society has a vested interest in this provided it doesn't infringe any other rights. It's why warrants exist. If you have the ability to respect a warrant without hurting your customers, it should be illegal not to do so.

Obviously there are significant technical issues, which is why this is contentious; those are outside the scope of this comment.