I'd say it's a mash up of players with various amounts of time with their equipment. I'm in that group for instance, and did a complete overhaul of my player about ~2yrs ago. Could have made the change then, but opted to stay with wood. Another went to a full custom, and chose to stick with a Vantage shaft. Yet, another recently bought a Z3 shaft in move away from a 314. So, in a way you're right. However it's not like these players aren't willing to swap out what they playing with and adopt something new.I still play with an allwood cue that I made probably 40 years ago. But I could see myself if I was a new player playing with a cf. Likely those players you're referring to are players who have played with the same cue for years and they're not about to really make a change.
I think the reality here is that players with real time under their belts and that understand the physics of the game, know that there isn't any performance advantage to CF, so why bother. Sure those in the other camp will tout things like both radial consistency and two separate off the shelf shafts hitting identically. However I know zero players and I doubt anyone else could pick up on any radial 'inconsistency' in a LD wooden shaft. For some, the risk vs reward is the prime consideration when attempting equipment swaps. Until CF reaches a point wherein it's on par or cheaper than wood, they're will always be hold outs. Myself included...