You seem to misunderstand what is meant by "dating down" and the refusal of women to do so. It's not a problem of philosophical compatibility and non traditional roles.
If I like fast cars and I'll I've ever been exposed to is your average beater, then it wouldn't take that much to excite me. A sporty commuter might even do it.
But if I've been consistently exposed to supercars, or if I even own one myself, then it will take a much more impressive vehicle to excite me.
Fundamentally, I'm still attracted to the same thing regardless of my situation: fast cars..but one scenario leaves me wanting a lot more than the other.