A central server forces all traffic to route through hardware and software owned by the maker of the technology and the attack vector there is usually logging.

A central server forces all traffic to route through hardware and software owned by the maker of the technology and the attack vector there is usually logging. A router at an ISP is not a central server. The attack you’re speaking of is a real possibility which is why end to end encryption exists. But p2p is meant to solve a different privacy threat than e2ee.