I wonder how much of the "no men" thing is a hang over from times gone by... when men did man things and women did all the rest! ;-) I wonder if it was done that way so that women could support each other, and discuss things without fear of retribution. In older times women had it pretty hard.
As for now, absolutely men have a place. My partner is colourblind, a fact I regularly forget when I ask his opinion! LOL But he has learned not to comment on the colour, and instead he'll say things like "excellent points there", or "did you rush that bit", etc. I value his opinion, he makes things with his hands for a living and has a great eye for proportions, etc.