I don't know if it's sexist. If it's a fact, it's just an observation. Facts should ideally not be sexist (although I understand the can of worms such a statement might open).

I'm inclined to believe that gaming in general is tilted towards the things that men like (whether culturally or biologically). And I'd welcome game producers/financiers/whatever to invest in games that offer things that traditionally non-gamers would be into, but I can also understand that those kinds of projects are riskier than going for an existing market.