Maybe I misunderstood what you said, sorry.
I don't think white knighting is actually what is happening here, and suggesting that the only reason these issues are being brought to light is because some men want to use that to get into women's pants is missing the point.
Because games aren't targeted at men. There is nothing remotely masculine about mobas in particular, and actually I've found that many of my female friends play mobas. The moba community at my university is about 50/50 men/women. Additionally, the objectification of men in things like erotic novels and fireman calendars or whatever is not reflective of the power structures of society.
There is still discrimination happening in the first world. Women are objectified and over sexualised in almost all forms of media and in society in general. Lack of representation, or only sexualised representation in video games is one aspect of this. You might say that there are bigger things to worry about, but from the number of articles, blogs etc discussing it can you see that it is important to a large number of people?
When you use discrimination in this context you devoid the word from its true meaning.
Its not discrimination to not be represented in video games or to be represented in a way that doesn't please you, I'm from Brazil, you won't ever see me complaining that there isn't enough latinos represented in games or how we are portrayed (usually they go way off target, half the time they will have us speaking Spanish or some strange variation of Portuguese, but its understandable).
Maybe I shouldn't have brought up the white knight angle, I'll admit. It just bothers me that usually the ones complaining are males.
We have many games that actually do a great job of portraying female characters, instead of confronting people that don't share your vision, perhaps it would be better to promote the games you think do a good job at it.
One thing I also don't get is why Japan usually gets a free pass(well, Kojima didn't and no one actually saw his game yet, but still) , they have the most absurd sexualised representations of woman (not to mention little girls).