> in what context would they ever produce utterances using any of these words appropriately and naturally? Part-time job? Friends or in-laws they'd like to imp

> in what context would they ever produce utterances using any of these words appropriately and naturally? Part-time job? Friends or in-laws they'd like to impress? Studying for JLPT? Just wanting to be able to speak everyday Japanese as it's spoken? Respectfully, I really think you have a distorted sense of this due to whatever your background is. Per a quick google, some of the terms I listed earlier show up in JLPT from level 3. I'm no expert but I don't think N3 is considered high-level diplomacy territory. If you got by here without using such terms that's fine, but it's no argument against studying them - lots of people get by without learning kanji, etc.