So sex sells and women like a good naked diet coke man, but they don't like men portrayed in that manner? I'm not sure what you're point is as you appear to have argued against yourself. But so far we've only got diet coke. What about, oh I don't know, every other advert? Even holiday adverts spend half the time with a camera panning over a woman sunbathing in a bikini, and the BTCC camera man has an unhealthy fascination with grid girls to the point where he needs a restraining order
Note that showing male genitalia in an aroused state in illegal in most countries, so no, GoT spends the entire time getting tits out for the sake of showing off a woman but can't actually show a man in a similar state. Wonder who made those laws eh? Bet it wasn't a woman. Other shows such as American Horror Story are just as bad. Lets get some crotch in there!
You can even see it in the general entertainment industry. This phenomenon is even recognised, and called "something for the dads". The idea that a man couldn't possibly watch or enjoy a TV show without a woman standing as a prop. The man presents the show, but lets get as much flesh on show as possible. If we can have it so the woman doesn't even get to talk, that's even better. Dara O Briain did a fantastic sketch about it actually -
Sex sells, but that doesn't make it ok to decide a womans place is as an object before she is a person - and that's exactly what we do at motor racing events, and you can see it everywhere in society if you watch closely. You can deny it if you want and shout "DIET COKE MAN! DIET COKE MAN!", but it doesn't change anything.
How is this related to motorsport? Well if you produce an environment that is painted in such a way that a womans role is to hold a board and look pretty, then you're going to get less women interested in it. Since I value women as people in our society, I'm not ok with that.