that can be the case, Al. although not to insult HEF's & Macbeth's kitties, some cats are actually not that smart although they will do well enough to survive on their own.
as for male cats, well i have more than enough of mine that went for a walkabout once they are mature enough. often times, out of 4 of the same batch, only one would stay home & be the male of the litter. the rest would either go for a permanent walkabout & never return, or at times would return for a short while before going off again, with one or two of the younger males that just mature following big daddy.