Exactly. It's only pointless as long as other people think it's pointless. If everyone made changes we could see a noticable impact happen.

Billionaires need to change too, they do more than their fair share of polluting, but it doesn't mean we are all off the hook. We should hold them accountable and also each of us strive to be better.

For some things, yes. The straw thing, no. If we snapped our fingers and made straws disappear, the effect on the world will be negligible.