It is helpful when used properly. It helps people understand themselves better. Mbti is very helpful
I never wished to be an INTP. I just was.
I've always gotten the same result (INFJ) even a few years apart and in different situations of my life. Recently I did the test with a friend, where we both took the test in the other ones perspective and we also got the same results again (She is an ENFP). It really showed, where we have different opinions and natural tendencies.
If there is something you naturally think or do, that is bothering you a lot, you could also work on changing that. not to be a different person but to be the person that makes you feel good about yourself. I think there is no good or bad personality type, so is there one you wish for, when you say you never wished to be INTP?