Moral support is a very good thing, and I have seen it do wonders...
But there is a differance between them.

There have been people come into my life, that were very talented, but they had no self confidence.
All they needed was for 1 person to 'believe in them'....and it changed their lives.
They had 'someone to shine for'....made all the differance in the world.

But there are others that have to constantly 'have their ego stroked', because they are insecure....and after day after day of it, you get tired of constantly having to 'prop them up'....it's draining!
At some point, they should be able to stand alone, just knowing that there is atleast 1 person in the World that believes in them, and thinks they can do whatever they put their mind to......but they don't.
It's a constant need they have, and I doubt that anyone could ever build their self confidence up enough for them to be able to stand alone.
These are the ones I think that feel so intimidated by a successful woman.
To them...the man is supposed to be the successful 1, not the woman....and they just can't handle it.