It's a different lense we need, this would be the argument: we should do x,x if we do it won't have enough effects by itself, it's better than nothing to have that desired effect, it's a step in the right direction to achieve the desired results, what we need to have is other people to also have the desired effect to do the same thing independently. The question is what is the effect and how much of a piece of the whole would it mitigate. Can the people who do decide to make a change in that one goal can they compare notes to improve on that outcome.

Tldr: do what you can based on where you are at your life and hope improves in the right direction, this applies to all things.