I turn on the faucet and fill a glass of water. Taking a drink from the glass, I feel less thirsty. If someone turns on a faucet, and as a result feels less thirsty, then that that thirst-removal must be inherent to turning on a faucet, right?
This is obviously silly, but follows the same reasoning that you have stated. Drinking water reduces thirst, not running water from a faucet. Redesigning a website to be less bloated results in a better mobile experience, not designing around AMP. It is possible to redesign a website without using AMP.
Causation does not imply necessity.