It's pretty simple. Ns think Ss are stupid because N's strengths are S's weakness. Same with E vs I, F vs T, and J vs P.
I think often times there is a big communication problem with N's and S's. When I meet a N with an undeveloped S, I have a hard time understanding them. N tends to be very vague when they talk. They jump from point A to G to K to Z. S's tends to go A, B, C, D.... etc
N's needs to be patient. They need to realize that other people ARE NOT MINDREADERS!!!!!!
N's are not more intelligent. Just because they can think more abstractively doesn't mean they are doing it right.
Has this thread turned into an N vs S debate? I haven't seen one of those in a few months. Someone should start a F vs T one as well. I like to read those too. It's like watching a boxing match where the boxers are shouting "my left hand is better" "no, my right hand is better" before the match.
I've actually gotten better at bringing my plans to fruition since developing my S, so I definitely don't consider them stupid. Just as I have been able to develop my S over time I'm sure many S types have developed a fair amount of N. It's a healthy balance that makes a person most effective.