It's obviously pseudo bullcrap; what's astonishing is that the hiring manager in the article is dogmatically following it and ignoring the advice of the senior technical people involved in the hiring process

That's arguably backward. The MBTI was developed to help people place into jobs, but it has not proven itself to be a useful indicator of that. Conversely, all it is is a personality measurement. When you analyze the type system, it's actually a fairly decent one. (Probably the best we have today, but that doesn't mean much if you think they're all bad.)

Sure - they're not the be-all answer to everything, but I've found them helpful in (re)assessing myself lately.

I found much more static-ness in my IQ over the last 30+ years. I was actually surprised at how consistent it was over decades and various tests (and, dare I say, slightly disappointed).