Well, it's more subtle than that. A male may wear shorts to be comfortable, but he's wearing a sleeveless top because he wants to show off his biceps. Sauce for the goose is sauce for the gander.
At work, I wear polo shirts because it's hot, not because I want comments on my arms.
And no, I'm not presenting an absurd example as contrast. My hobbies are strength training and jiu jitsu. I have large arms. I also know what women with large breasts must feel like, because the first few times I wore short-sleeved polo shirts to work, I could literally watch people's eyes track my arms. I understood why - I had only previously worn long sleeve shirts, and my arms are larger than most, so they stand out. And I got no comments, but I would have felt uncomfortable if I had.
Sure it's possible, but I don't get to wear my pyjama at work. In fact in most places I would feel awkward with shorts, too. (Now we could argue if it is the work place or the pyjama wearer who is at fault, fair point).
Because it's more comfortable.
So, maybe it's possible that a woman might wear a low cut dress because it's more comfortable?