Myers-Briggs is pseudoscience. I would not base anything substantial off of it, you might as well use TeenVogue personality quizzes since they're just as effective (shorter too).
I will say learning to interview is a skill like any other, I have no doubt the person you replied to was not born into the world understanding the nuances of technical questions and what heuristics to use to determine validity. Just like yourself.
The inventors' theories were unscientific. But MBTI traits correlate moderately to strongly with Big 5 traits. And reliability is comparable to Big 5 when the traits are treated as scales like nearly all MBTI tests. Claims reliability is low come from treating the traits as dichotomies and any variation as failure. The same methodology would make Big 5 look unreliable.
