She's just trolling at this point. We all disagree with her first statement, but her second statement is merely her saying that we're all hypocrites, then defying us to prove otherwise. It's a straight up insult, though she's not incorrect. The issue is that there's friction between the two. She's implying that even if we're having an effect on the world, as we claim, then it merely turns us into hypocrites unless we go all the way to the other extreme of making sure that nothing in our lives cause unnecessary human suffering. The implied assertion is that being a hypocrite is a bad thing, and we should adopt her philosophy instead, that since we can't do everything, we should do nothing and instead live isolated lives, fulfilling only our own pleasure, regardless of the effect it has on others.
Unless I'm trolling her, and merely trying to make her keep responding. I'm not sure I could objectively tell whether I'm responding because I'm being goaded, or because I'm interested in goading. Probably a mixture of the two, and I'm most certainly a hypocrite in this and many other ways.
But I'm making a difference, so it's ok to act hypocritical and work towards the goal of better aligning my actions with my beliefs, though I know I will never arrive at the spot where I can say I'm not a hypocrite.