From Return to Little Kingdom by Michael Moritz: http://jmtame.posterous.com/hes-got-the-whole-world-in-his-h...
^^ First sentence of the article.
You don't need to cite references to give a counter _opinion_
It's perfectly logical, as it's not cheap to do what Apple does when it comes to creating. There's a reason they just hit $100 billion in cash - Jobs knew full well the value of profit and what it should properly be used for. They know the value and safety in being able to build what you want to, and not being constrained for oxygen due to low cash or debt or lack of profits.
He doesn't have to have "learned" it in some specific source, besides observing Steve Jobs actions and words.
So, 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.)
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?".