I, as an INTP, until very recently had just the despicable view of emotions as completely irrational and stupid. I considered use of emotion - especially to persuade - as indicative of some sort of mental debility.
You can imagine how much pain this caused to my INFP mother.
However, after getting a bit into MBTI, I did a fair bit of soul searching and much to my horror came to the realization that it was I who was at fault for the vast majority of the conflict and the suffering growing over the past years living with my mother. So she and I had a bit of a sit-down where I explained my ignorance and how wrong I was to completely ignore emotion. This was definitely a big healing moment, as my mother had feared we would simply grow apart without ever having understood one another when I move to university in about a month. In addition, I've definitely become more aware of my own subjective values, the possession of which I had been in denial about.
While my mother and I still don't always see eye to eye, now I definitely go out of my way to see things from point of view, whereas previously I would simply tend to steamroll anything she was saying as stupid. Conversely, she also realized that my emotional detachment wasn't necessarily borderline autism, and that just because I almost never express what I feel doesn't mean I feel nothing.
So yeah, emotions are important. Understand them, tend them. Even if you don't use them in large part yourself, accept them as a valid way of achieving reconciliation with the world around you.