I think it is an important point. The influence of a player is often determined not by their ability but by the levels of exposure they enjoy because of the gig they have.
When Paul Chambers was doing the Miles gig (1955-1963), he was all over the Jazz scene recording hundreds of sessions with everybody. When he left the Miles band, the sessions dropped like a stone and Ron Carter, Pc's replacement in the Miles bass chair, was the first call guy.
Was this about the players or the reflected glory of recording with a Miles sideman? I know what I think.
The thing is, a lot of influential players are in no way the 'best' players, they just have the highest profile gigs. Sometimes this lines up but, often, they don't.