same for MBTI. i don't know what specific MBTI type i am supposed to be, and i don't really care, but understanding the different aspects that MBTI is based on does help me understand myself better and let's me explain for example why i enjoy company some times and not at other times.
there used to be a time when astrology and astronomy where the same thing. astrology is pure nonsense, but the astronomy it is based on is not. in the same way MBTI may be nonsense, but the aspects it is based on probably are not.
to be a great listener it takes a few things, to listen, to give positive feedback and to help the other person work out what they want to say. listening itself makes up the biggest part. pretending to be a great listener may work in the short term, but someone will eventually figure out that you don't actually care about what they say.