I am going to agree with you on this one, men have a much less options when it comes to clothing in general and professional clothing in particular. Not only that, professional clothing is one area -I would say the one area, but I realize I might be wrong in that- where men are paying more than women.
And I’m also going to agree men would work just as well in jeans and t-shirt.
But I’m secretly kind of happy that you don’t get to work in a jeans and t-shirt. Men in suits look really nice.