I could buy their reasoning for AMP and site speed, if and only if they make it easy to get the URL. When it first came out you couldn't get the URL either and

I could buy their reasoning for AMP and site speed, if and only if they make it easy to get the URL. When it first came out you couldn't get the URL either and they added it after people complained. The removal seems to make it clear that it's really about control and keeping things within the confines of their own system.