I'm sure people who dismiss women exist. But are they significant? People are being dismissed for all sorts of things. Wrong age, wrong taste, wrong education, wrong school, wrong accent, wrong religion and so on and so on. The question is always, are the jerks a significant enough fraction to have an impact. Women are the majority of the population, so they should have a sufficient supply of business partners. Even if all men would say they don't want to work with women, there would still be several billion women to do business with.

I'm a man, and I don't automatically get every job I apply for. I wonder why that is?