[prawn]

I think it might be because that self-reliance often comes with defensive language/attitude? It's one thing to be self-reliant and another to ooze a miserable attitude about it (e.g., "World's never done shit for me, guess I'll have to just look out for myself."). Without that outward expression, you don't notice that some people appreciate the importance of self-reliance without it feeling anti-social.