I suppose youre talking about terms of art. That's true for business too, I agree, but I'd argue that this is words/phrases like "EBITDA", "division", "tier 1 client". There's also useful shorthand like using the CEOs first name only, which happens even in Megacorps where few people have ever even met the CEO.

Corporate-speak is something different though to me - it's purpose is not to convey any specific meaning but simply to posture, which is why it's so widely hated.