Why is there so much separation between the professional audio and audiophile worlds?

Anyone that says all digital sucks has clearly never heard a decent SACD played on even a moderate system, among other possibilities.

The overlooked question from this article is why don't both disciplines - pro vs public, jointly find advancements in sound reproduction that would benefit everyone? At one time, among other studios, Atlantic Records had a NYC studio full of Mark Levinson's Cello gear according to him. Obviously, given the at the time $25k minimum a Cello system cost, it wasn't meant for the casual listener, but as in other industries, advances at the top end should trickle down the food chain but often in our hobby, they don't.