Oh come on, that is a pretty flawed argument. "Tell me, how me doing this particular, isolated thing, is directly causing this complicated big thing, otherwise you are wrong".

But we are not arguing that: We are arguing about, what if I had a magical button that would magically give everyone in the world access to the "decent living standards" and nothing more? Would it be ethical, would you push this button? Even if you are, right now, way above the line?

And to that I say, yes, if it was possible to do this, I believe it would be the right thing to do. And I believe that anyone arguing we should not press the button, because pushing this button is hurting their lifestyle, is arguing that billions of people deserve to live a much worse life for being in the wrong place so that we can have our lifestyle.

Of course I do not have such a button. That is not the point.