Okay, imagine someone is blasting your house with a high-pressure hose, breaking all its windows, flooding it, etc.

Your argument is to target the people who make plastic because that hose nozzle has plastic, rather than either convincing them to stop selling hoses to psychopaths or targeting the psychopath with the hose.

Again, the guy with the hose is just glad you're focusing your efforts elsewhere while he destroys everything you have.