Okay, lets imagine this scenario.
Rapist is lying in wait for a victim. He spots two women walking separately down the road.
One is wearing low but very sexy boots, skin tight trousers, fitted low top with cleavage on displa, walking quickly, both arms free. Very attractive pretty girl, wearing gorgeous perfume.
The other is wearing a floaty but short dress, high platform sandals, faffing with her handbag, long ponytail, she too is a very pretty girl...
The man is desperate, he has to rape someone, its a quiet area, but it is residential, he doesnt want too much of a struggle...
Which one would he pick?
Looks have nothing to do with it, sexy clothes have nothing to do with it, he picks the one who he knows will be the easiest to rape. The one wearing least clothing. The one with the pony tail he can grab to yank her head back, and she is likely to lose her balance on her high heels.
So yes, the clothing DOES make the woman more vulnerable to a potential attacker.