That's right. And let me say it's totally valid to just ignore that advice, and say that here, in this company, we use 200 OK for everything that isn't a parse

That's right. And let me say it's totally valid to just ignore that advice, and say that here, in this company, we use 200 OK for everything that isn't a parse failure. And that's not totally wrong! It won't break anything. You're not really leveraging any of the power of your transport but maybe that's fine for your situation.