No, it is not full or none, that is ridiculous. You are allowed to have a line that you will not cross.

How is it reasonable that "this line that you will not cross" is pornography and not "an app that tracks and controls Saudi Arabian women"?

It would be ironic if the USA government tried to regulate or fine Google on this, while at the same time selling heavy weaponry to SA.

It's reasonable because it's their own decision to make.

What you (or any of us) think about it in moral or ethic terms, is irrelevant.

Not if you want neutral carrier protection under the law. As soon as you start to pick and choose you loose that protection and you are liable for illegal content on your service.

What would phone service be like if the carrier could decide who gets to use it and who doesn't? They are not held responsible for criminals using phones but if they decided who gets to use it they would be liable.

And they do. But what exactly is that line. Prurient content that empowers people? Banned. Content that literally allows control over non-consenting individuals based on their gender? Accepted.

This is like a serial killer who campaigns against littering. They have a line they won't cross, but we shouldn't accept it.