The things you seem to be describing are typical male power fantasies. Being brave, powerful and competent, bringing your enemies down through strength and guile... men look up to other men who embody these traits. In media, we typically gravitate toward male protagonists in the same vein. As we get older, we become more capable of appreciating deeper and more nuanced characters, but those archetypal traits still resonate on some level. I don't think responding to that bespeaks some lack of maturity.
When people make statements like this, whether or not they realize it, they seem to be implying that masculinity itself is bad. That the desire for competence and mastery, the drive to excel, to surpass one's competitors and dominate one's foes, betoken a lack of maturity. Men should be ashamed of this part of themselves, the argument goes. Responding to depictions of such fundamental elements of masculinity is childish, something to be abandoned as they grow older. I have a problem with this. I'd say that maturity is about showing restraint and judgment in dealing with others, about sublimating these masculine urges in constructive (or at least not destructive) ways, rather than excising them from the male psyche.
I have no trouble with the idea of gaming being made more friendly to women, from both the industry and content standpoint. What I take issue with is that these need to be sweeping changes that affect all games, because some of the changes that would make games more appealing to you would make them less appealing to me.
In an ideal world, we'd have games that skew to 'male' tastes, games that skew to 'female' tastes, and there'd be a degree of overlap between the two - like the movie industry. I'll be the first to admit that the current balance is pretty lopsided, and that can certainly afford to change. But as I said earlier in the thread, I don't think the answer here is to lay a guilt trip on men for enjoying things that skew to masculine tastes, and nuking anything that smacks of that from orbit for the sake of gaming's future.