If they did would it change the argument? You pay $50/mo bucks to send and receive packages and if you sent everyone in america a couch they would either stop doing business with you or charge you more.

Hackers for some reason really hate the "we charge a flat rate to everyone averaged across normal usage so almost everyone doesn't have to think about metering but then charge outliers more" pricing model. It works the same for roads, once you're driving semis the price goes up. XPO doesn't go "well we shouldn't have to pay for our road damage because the stuff we deliver is requested by our customer."