It's technically correct that it doesn't help with reducing CO2 emissions. But plastic recycling is a flop and a charade. Reducing use of plastic is going to be the only effective way to reduce the harm from plastic. But if we're up to our asses in plastic that's going into the environment in our bodies, burning it isn't a bad choice.
I'm not talking about recycling plastic, but about burying it it in landfills.
The plastic in our bodies is not generally getting there from environmental pollution, it's getting there from us using plastic to wrap and cook the majority of our food and drink and cosmetics etc.