Avoiding business jargon doesn't mean having to stick to the 1000 most used English words.
Which the article points out, though not plainly, should be avoided.
In any case, your language here would certainly run afoul of the "simple English" the OP is espousing, and the OP terms such things "jargon", so contextually, yes, it's jargon.
Although personally I agree, the OP is using a particularly sloppy definition of "jargon", which often has a stronger technical connotation than merely metaphorical or business newspeak language.
It means “young urban professional.”
Sorry to burst your bubble but that’s jargon.
> Yuppie isn't jargon, I was thinking about the movie American Psycho.
It’s also jargon.
> It's just a term to refer to your stereotypical middle managers high on their own farts.
I know what those terms mean.
> business jargon
Oh wow look at those goalposts flying by, amazing.
Hell, your comment is full of jargon. "Yuppie", "buzzword", "suit" (and "empty suit"), ...
[0] though it's usually very contextual when that's the case, which is really frustrating when things are taken out of context and either become completely unintelligible, or easily misinterpreted (and sometimes wilfully misrepresented).