No, that’s just my standard “definitions are boring, let’s just agree to not discuss them”-disclaimer. Ah, well.

Definitions don’t make the problem hard. There is just no one true definition of beach, that’s fine. We can agree to use the one most commonly used or you can pick one, it doesn’t matter as long as we communicate the definition we are using.

I again and again find it astonishing that so many people have problems understanding what definitions are all about. They are about communication. Arguing about definitions is rather pointless, at least if you goal is to learn something about the world. (Good definitions make communication easier so there is room for argument about definitions but not really in this case.)