Successful men are not intimidated by successful women, they just don't desire them (for their success)...in general.
The intimidation comes into play when men are put at an income disadvantage. Women also don't find men who make less than them desirable (in general). So it's a double wammy.
A single mutli-millionaire guy is not going to be impressed by a woman who works 50 hrs a week and makes $400k.
He would rather someone available to take care of his needs while he can take care of the financial needs.
This is the opposite of what successful females want.