Intelligence is a tricky word to use in any situation. What does it actually mean to say someone is intelligent? Or not intelligent? what constitutes the measured intelligence? Is this able to be measured by objective or subjective means, etc.
The MBTI is simply a tool that we can use to learn more about ourselves or others. It's a profile on our general tendencies and preferences. That has little to nothing to do with intelligence as a whole.
All types have their gifts to share with each other because the world needs more than one type to go around.

if the world was all NFs it would be all cuddles and rainbows for about 5 minutes and then some kind of emo meltdown would occur. (they would be an EPIC 5 minutes....)
I have four friends. One is an NF, one is an NT, one is an SJ, and one is an SP.
The NF is a super empath and always has a shoulder available for someone to cry on like she's the empath's answer to shiva. However, she is a giant flake who asks me questions like "yay! I downloaded a new game to my iPad.....wait! It disappeared!, where did it go!??!" answer: scroll the screen over.
The NT is a genius when it comes to computer science. However, he cant type a paper that made sense if it would save his life. He changes tense mid way through a sentence.
The SJ is an incredible teacher who's students adore her. However, her frequent inability to see the forest for the trees creates tension with her friends and coworkers because she bogs down into detail land.
The SP is the best painter I have ever met. He watched the tv show lost with me because he thought it was entertaining. He spent exactly 0 minutes logged onto
www.the fuselage.com chatting about convoluted theories.
I guess my rambling point is that it is easy to want to shove mbti into everything like it's sugar, but it doesn't work that way. I did that myself many years ago and it didn't make me happier
or really even happy period. I started viewing people based on whatever type I thought they were instead of along the lines of hey, this person is nice to me and others and I enjoy time spent with them.