> I find this "citation needed" meme, when the thing discussed is some personal opinion or a value judgement or an estimation or some sort, to be ridiculous.

It's important to note that these sorts of people are often not interested in a discussion; they merely want to be proved right on the Internet by hiding behind the perceived invincibility of empirical facts.

You are right: it is toxic, pedantic, and not something that most people would have the gall to say in real life. Thus, not worthy of being addressed. (edit: though the grandparent post was nowhere near as bad as others I've seen.)

Seriously, what could the citation be? A quote from Jobs saying "I love profit. I understand that the best products, marketed properly, can produce extraordinary profits."?

Asking for citations for fact-based claims is absolutely a good practice, but citations for opinions/conclusions are, in many cases, not feasible.

That said, I think the GP probably meant "what do you base this conclusion on?".