There are plenty of threads about this topic on which you could post your question. A vanity is not justified.
I keep seeing this phenomenon where freepers think they have a thought so profound about a topic well covered they just have to post a vanity. They don't.
I had been asking the question in other threads and nobody can answer it. I did it to consolidate ALL the answers and to get wider feedback which would hopefully help us to coalesce around the truth. But alas...