Not thinking that the eyecandy knows about their product is not misogyny. It's very much common sense. I wouldn't think that the attractive women who pose in front of cars in front of trade shows know about the cars they're trying to help sell either. They're not there because they know about the product and want to sell you on its features. They're there to look good and draw your attention to product. The issue is NOT that women have to prove themselves before we accept them as part of gamer culture. Come on, Bob. Plenty of industries do this same thing and I don't think anyone would say they expect the babes to know anything, because that's not why they're there.
I want to be able to object to this type of position without these casual accusations of sexism. It's a cheap, lazy, insulting, and downright gross thing to do to your customers, and I think more people should say so. I'm getting tired of this culture where if you object to things like this, it's sexism. If you refer to groups of women in ways relating to their position, because that position is awful, when making an insult, it's sexism. It's not sexism.
Neither is objecting to people drawing your attention to a product with their breasts while there are breasts in the game. If these sleazy tactics were used to sell movies with big busted women, it would be equally shallow and equally insulting. The problem isn't breasts. Sexuality, when displayed for the right reason and in the right ways, is good! But you have to remember that context means everything. Something so insincere and pandering as booth babes is not the same as a character in a game looking sexually appealing.
It isn't a matter of growing up. Hell, getting rid of what you seem to imply is immature about these games would strike me as an immature myself. It's not childish and it shouldn't be demeaned. People should be free to make the games they want to make for the people who want to make them. We shouldn't rag on people doing that because sometimes what they do doesn't appeal to everyone. We don't want to be that community that complains when someone does something that you don't personally like. Instead, we should empower others to make games that they like that don't feature the aspects of games you don't. It really is that simple.