Yeah, what parent is describing isn't muntzing, but the simple act of being dense in a setting where nobody can say it:
> He kept insisting on completely bizarre design changes, and ridiculous cost cutting on design like using 2 cheaper through hole diodes in parallel instead of one a cent more expensive (did not believe my ears, the guy failed EE101 right here,) dispensing with NTC inrush limiters, removing safety caps (he did not know what they are for) and asked us to redo the mold 6! times in order to save some grams of plastic per run.
I've seen this happening plenty of times, too. The higher-ups in many consumer (and even non-consumer!) companies are 100% clueless about these things, but they "know" that Chinese OEMs try to "rip you off" on designs, so they will demand their staff to squeeze them (and will promptly fire or replace anyone who dares tell them that a design is actually okay).
So every once in a while one of these smart guys will show up and make completely stupid demands. And explaining someone who doesn't understand basic electrical engineering concepts just why these demands are stupid is completely unproductive -- they don't just lack an understanding of the jargon, they lack an understanding of the most basic concepts. It's akin to trying to explain someone who doesn't know what a for loop is why you're using a hash table in a place where "a simple array would suffice".