Sure, but that does nothing to help with the tragedy of the commons caused by unaddressed negative externalities…

This is more like the politician's syllogism.

https://en.wikipedia.org/wiki/Politician%27s_syllogism

Except it actually addresses a serious problem on two fronts

1) reducing the ability to profit off of actions that cause environmental damage thereby aligning the market interest to reduce such actions

2) funding the investment in reversing the damage

whereas your suggestion above is doing literally nothing to help…

And why would you price it at $0 if it's already known it does cause damages. Just because you can't fairly price it doesn't mean it costs zero, that's an absurd logic...