I don't see the male poses as equivalent as I'm not aware of any male human poses styled like ballet dancers.
What gave you the idea that this is what constitutes male sexiness? Have you ever stopped to wonder why a lot of women think fire fighters are sexy? Is it because fire fighters tend to pose like ballet dancers, or is it because a well trained male body working, or in a pose suggesting action is something that is really commonly thought of as how men go about being sexy.
If we go watch 1000 sucessfull atempts of a man picking up a girl at a bar, how many of them do you think did it with ballet poses?
There is a very simple question that anyone concerned about what levels of sex appeal suggestive stuff should be allowed in a creative medium can ask:
Should porn be illegal?
If the answer to this is no, then ask yourself a couple of cuestions regarding other and milder types of sexual content. Unless you end up being a contradictive hypocrite wanting to allow porn but ban really mild stuff, then you have demonstrated to yourself that you actually think it is ok for a game, or movie or book in theory to include something sexually suggestive, but for some reason you are just trying your hardest to invent a reason for why its wrong for this game in particular.
Unless you want to outright ban sexual stuff, then its ok for creative media with sexual undertones to be part of the market, and the frequency of them will be regulated by market forces. People buy what you like. If you don't like something, don't buy it. But stop riding some imaginary stick moral horse around and make a fool of yourself.
We as a society create what constitutes sexy for everyone. It's why things like fashion are continually changing; our ideas of what makes someone sexy changes over time. This means that Larian can choose to do poses that fall into what we're used to or do poses that do something different. We wouldn't mind them doing something new that breaks away from sexist stereotypes.
I don't think we're talking about banning sexual undertones or sexual material, we just want a break from a very well-established norm. If someone had you continually eat different variations of cereal for a long time you'd still eventually get tired of it no?
Though it is true that the market supplies demand it also creates it. It's why when something new and interesting comes up we all jump on it. Consumers enjoy trying new things.