> You could use exactly the same argument for not bothering about doing things that pollute, generate landfill, or generally make things worse for society.

Which is why those things need laws to create any meaningful change.

That's not a justification for participating in them yourself, though.

I could make that exact same argument, and people have been for a long time: https://en.wikipedia.org/wiki/Tragedy_of_the_commons

These are all related to the collective action problem (https://en.wikipedia.org/wiki/Collective_action_problem). This is why we have regulations and rules and laws about things like pollution, because we CAN'T rely on everyone wanting to live in a clean world to make everyone not pollute.