I never said that. What I meant is that a behaviour, which benefits a species as a whole but reduces one individual's fitness, is not evolutionary competitive. It's evolutionary game theory, like the prisoners dilemma from normal game theory.

And to determine if some behaviour is such a dilemma, you have to consider costs and benefits of it, which is not at all clear in natural situations. That's why I said it needs to be studied.

But I must concede, I sort of assumed what exactly you called an evolutionary advantage. Common homosexuality in penguins or not discriminating against homosexual individuals in penguins have very different analysis here.