Right, but I'm not all the poor people. And I can't control them either. Yes, if everyone stopped eating meat, we'd stop farming them and emissions would drop. But that's unrealistic, never gonna happen. So yes, my impact in negligible.
And I'm not saying I won't do anything because my impact is negligible. I still recycle and encourage others to do the same and so on. But realistically speaking, I'm nobody. What I do doesn't change anything. At most I may have influenced 10 other people to be eco friendly. Still didn't change anything in the grand scheme of things. But maybe once a few more million people do the same we'll be ok. We'll see.