Are we allowed to post links from other personality sites? Because if I could do that it would be much easier. However, rather than risk it, I'll just post this.
This graph shows the MBTI types ranked more or less by IQ. Specifically, by likelihood to be gifted:
INTx are the smartest types, right there in black and white.
Now, the thing people don't/won't acknowledge is the intelligence and IQ is the main arbiter of a person's worth. Everything about you stems from your intelligence - your capacity for success, your ability to think and have ideas, your emotionality, stability, and sensitivity, even unlikely things like athleticism (I'm trying to find the source where I read this....there was a whole list) The high IQ person is basically a god among men, capable of perfection in anything and everything. Here's a list of all the things positively correlated with IQ. Is it any wonder the average always envy the gifted? Why wouldn't you be frustrated to have someone's existence constantly remind you of how worthless and useless you are, to always know that you are completely and utterly redundant, a living joke in your inherent incompetence?
Because that's what being a Sensor is. Living with that. S-types are useless, living constantly off the intellectual labor of NTs. Don't believe me? The entire civilized world was built by NT types, Sensors just live in it despite not deserving it or being able to contributing anything relevant to it's improvement or advancement.
The rather interesting thing is this graph also points out that emotion makes you stupid. NTs don't have much in the way of emotions (though some would claim they instead actually have the strongest, deepest emotions), and they are the most intelligent people in existence. No Feeler has ever accomplished anything of merit, certainly not a Sensor-Feeler (no Sensor-Thinker has ever accomplished anything of merit either, but still). Usually it seems like a stereotype that robotic unemotionality and quasi-sociopathic insensitivity equals intelligence, and it would seem that that's true as well.
That said, I'm an ISFP with an IQ of 101, by an actual test. Other scores and indicators have implied it's higher, but I doubt that considering my life and now my type.