So - the gig (and the style, and the other gigs that spun off from that) became as much of a country-club clique as it did a seriously driven musical environment, or anything else, the innately curious Jimmy Giuffre & Shelly Manne, and perhaps a few others being the exceptions that prove the rule. Leisure music for the plush ones. As much indulgence as compulsion.
Sounds about right to me, not that there's anything wrong with that. Cliquishness is pretty much unavoidable in any movement, although a clique based on social similarities in an environment where social order is largely preordained and enforced can understandably be viewed as "racist" in effect if not intent, and not without at least some validity.
In the end, though, all the Pleasant Bob Cooper Solos of the world cease to be relevant in a world where Jimmy Giuffre & Teddy Edwards both kept on kepting on (and Benny Golson moved to LA and blanded out and Oliver Nelson went to Hollywood and stuck those dissonances anywhere and everywhere he could, pretty much was anywhere and everywhere), unless you need it to be otherwise, and me, I don't.
So yeah, Tubby Hayes would have slit throats and drank blood. Now that would have been Cool Jazz that really was cool!