Perhaps the INxPs resentment is more of an F thing, because I have a very strong T and have honestly never felt that. Instead I don't understand why one would go so far into something, allow me to offer an example.
The INTP in programming might half finish a pogram, and once they're convinced that they 'could' write the program, they are fully satisfied. INTJs on the other hand need to see it work in all its complexity. Resultingly, the INTP has more unfinished projects on the go at all times (that likely are never finished) and the INTJ has far less projects, but they often finish.
My P % is pretty low however, therefore I am the ultimate master of many fields. :P