This is pretty silly thing to say. Investment banks suffer zero reputational damage when their analysts get this sort of thing wrong. They don’t even have to care about accuracy because there will never be a way to even check this number, if anyone even wanted to go back and rate their assumptions, which also never happens.

Fair enough. I was looking for a shortcut way of saying "I find this guess credible", see also: https://news.ycombinator.com/item?id=46126597