I don't understand this "we're not robots, it's ok if we act irrationally" argument. While it's correct, it doesn't justify irrationality. If it could, you could justify anything with this. You could say it doesn't matter if God exists, humans are not robots and we want to believe in it so we do. Sure, if that's what you want, more power to you, but your argument is not convincing. I visit my dead family's grave but that doesn't mean this is an inalienable part of human experience. It's just culture, like eating yogurt with sugar vs salt.