We have plenty of Catholic members. The Masons didn't exclude Catholics, the Pope banned membership in Masonry by Catholics because he considered the organization a threat to his authority. That ban is pretty much ignored nowdays.
At the very least, I think pjc50's observation highlights that there is a certain inertia in some industries that perpetuates a bias toward one or the other gender.
Edit: changed a couple of words to make my point clearer.
Well if we're doing anecdotes, I work for the second largest IT firm in my country, and the management is largely made up of women, and I don't believe any of them to be freemasons.
Perhaps this observation has more to do with location and culture than it does industry.
They've opened up slightly in response to pressure, and there are some female freemasons, but it's still pretty exclusive.