Exactly, plastic is not a material but a very broad category of materials with a wide range of properties. Micro-plastics are a specific problem with some plastics and rubbers in e.g. tires and other materials on cars because they erode away with normal use and the resulting dust is then flushed into sewers, waterways, and eventually the ocean.
Material science is providing a wide range of new and exciting options that go above and beyond what we could do only a few years ago. Dismissing something with essentially no understanding whatsoever is not helpful.
