Specifically: provided the plastic is going to well-managed landfill, and not being washed into the oceans or waterways, then really, what is the problem? Once in landfill it's CO2 which won't end up in the atmosphere, or water, or really doing much of anything while it just sits there.
And every bit of it is oil production which won't be burned.
Some plastics get incinerated, it isn't all sequestered in landfills.
Hence this qualifier. In my region, my trash goes to landfill. I've been to landfill! It's a modern design with stabilized storage cells, you can see them excavating it as they expand.
And more importantly, the people who actually DO pollute by the ton want you to be more worried about your straws than the laws that allow them to do it. Don't fall for it.