Don’t make them to begin with. Plenty of 3rd party making chargers already, with many more useful than Apple’s own (higher wattage, multi port, etc).
People are arguing about waste and blame it on consumers, while Apple themselves already made those chargers to begin with. If the argument is that most people already have chargers, then stop making them if they cared so much about waste.
Most people having chargers is not all which means Apple (or someone else) would still need to make them. By not including them with the iPhone, Apple is at least cutting down on excess production of chargers. The problem is that some see this as Apple being cheap and doing it for money/profit reasons.