There does not appear to be any regulation forcing developers to cater to any particular demographic. So I'm not sure how there can be any claim of restrictions on creative freedom. The only constraints on creative freedom are the market forces of: How much does it cost to make the game? How much can you sell the game for? And how many copies of the game can you sell?
It seems to me that overt homophobia is likely to diminish the sales potential of a game, but big boobies, naked boobies and female characters with unnatural body shapes still helps game sales. So people wanting to promote a homophobic agenda are likely to have their creative freedoms constrained because the market won't buy their shit. But horny heterosexual dudes are still a substantial market segment, and sex still sells.
I'm not aware of games particularly catering to ethnic minorities. Except to say perhaps that white people are an ethnic minority on a global scale (and gaming is a global market), so perhaps developers having to mostly cater to white people is constraining creative freedom a bit.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
