I think it 's also tactics dependant. If you play LI or LP, It seems to me that the Center are at the end of the chain. And will most of the time take the shot instead of looking for a pass.
On the other hand with outside/neutral offense there may be more opportunities for the center to pass, especially with slow tempo offense. It might also be helpfull in both Isolation, sort of pick and roll.
I wonder vs which skill the Center PS is checked. If it is checked vs the other C OD, there could be a better reason to pass tha nchecking your C IS vs the other C ID. If your PS is checked vs the defender ID, it would most of the time be a worst option that taking the shoot IS vs ID..
I record my team stats in a spreadsheet in a way that I can also split them by tactics.
LI gives 33 assists
RG gives 30
Push gives 27
and the other around 20
30 assists vs MM
25 vs Z 2-3
20 vs Z 3-2
I have no stats on what amount of those assits are made by each position. Yet even my big guys with PS 7, only do 1 or 2 more assist/game than the ones with PS 1 or 2.
I should add, that I have a good offensive flow at all other position, and my feeling is more PS at C won't help much here. Not to the point of training PS for C. If I were to train secondary for C, I'll do HA and DR