You know, this is a great analogy to racism, sexism, and other types of prejudice that can cloud one's perception.
We took a group of people, and separated them into categories based on type. Now, keep in mind that type DOES have some correlation with one's personality and behavior, just as race (different cultural values) or gender (different social expectations, possibly hormones) can. However, when people are sexist, typist, or racist, they're making a few mistakes:
1. Different races, sexes, and types are different, but that doesn't make some inherently inferior and others inherently superior. It's natural to want to say, "I'm the best," and people may want to use things like gender, race, and type to support their assertion. However, no person is inherently BETTER than another. They can be better at certain things... T's are superior to F's when it comes to logical and detached thinking... generally. This brings me to my next point:
2. While there are similarities between types, as there are between sexes and races, that does not mean that all people of a certain type exhibit the stereotypical behaviors of that type. There may be highly emotional NTs, or strictly logical NFs, Ss who have managed to get far in theoretical mathematics, etc. There is a lot of deviation from what we take to be the norm. Judging someone based on type, race, or sex is presumptuous. It's best to look directly at the person in front of you, rather than try to make predictions about them based on the groups they belong to.