Over the years, I've had about a dozen close girlfriends and hundreds of casual girls-night-out buddies. Not once do I remember anyone joking about men not being too smart. Where do you get your "all women, always" from?
Either: a) You're just making this up. Humans are just not that invariable. I've had hundreds of casual night-out buddies of both sexes... and I would be lying if I could state any thread that ran through all of one gender, anatomical traits aside.
Hell, I'd be hard pressed to find a thread that ran through even half of them, with the possible exceptions of 'likes to imbibe some form of inebriating substance' and 'speaks English'
b) You state 'joking', so perhaps all general criticisms of men were considered serious statements?
c) You state you don't remember, so perhaps you get so blind drunk you can't remember any conversation?
"all women, always" is not that much worse than "no women, never"
Of course "no women, never" argument is just as stupid as, "all women, always" argument. If I made the argument. You took my rather short counterpoint/anecdote and ran away with it. Far, far away.
How do you go from a few hundred casual drinking buddies over the years to blind-drunk nightly excursions That was one of three options in my "Either" list, jokingly picking up on your "I don't remember" comment.
When you're complaining of other people taking you out of context, it behooves you to take them in context.
The "no woman, never" thing was referring to you saying that in your vast experience of socialising with women, you do not recall a single incidence of -foo-. In casual talk, that's making the point "no, never".