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.