You’re still doing it wrong. I could say “Cars, bikes, toasters, fenceposts, bedsprings, nails” or “Sidewalks, steps, foundations, roads, walls” in regards to steel and concrete. Neither are naturally occurring materials and cost lots in energy to turn out, especially the latter.
We have definitely gone about plastics the wrong way, but plastics are the future, especially in regards to recycling and environmental consciousness. Take Germany’s initiative that states to any car manufacturer in their country; If you build cars here, you have to be able to take them back and completely tear down the car. BMW went from 220+ types of plastics in their car to a mere five.
I understand your concerns, particularly in regards to the history of pollution and other issues, but I think plastic is still the way to go on certain things…