Plastics are necessary. Just as cars and airplanes are necessary to civilization. Cellphones and computers are also necessary. I just got a life saving operation two months ago. None of these things would be possible without plastics.

Civilizations grow on top of their earlier innovations and we can't just go back to the way things were without a collapse. How do you think the cell phone in your pocket could possibly be made without plastic? Or how about the Starship?