You have to consider (at least in Rondo's case) how efficient his "play-making" is. This was (most recently) in another thread, but someone from the Wizards looked at every pass from Rondo that either resulted in a shot or a turnover (where a shot would have likely happened without the turnover) over a 3 month period and found that the Celts scored on (IIRC) 55% or so of those passes.
Since that includes turnovers, the actual conversion rate on the shots taken would have to be higher than 55%. So the raw fg% on shots taken from Rondo's passes is over 55%. Consider the percentage of Rondo's assists that are for 3s, if the raw fg% is over 55% than the eFG% will be over 61%. The study ignored and-1s and it ignored any passes that resulted in fouls that would lead to foul shots, so (estimating, the league average for TS% is about 8% higher than eFG%) the TS% would be higher than 65%.
How many point guards have a TS% higher than 65%? *That's* why it doesn't necessarily make sense to value scoring over "play-making".
This doesn´t really address my question, either.
It´s Rondo´s job in the offense (designed with that in mind) to give his teammates better looks. It´s probably the reason why he has a starting spot in the NBA, he should be good at it. Doesn´t prove how it´s more valuable than scoring.
For example, did you subtract the loss in conversion rate of passes from his teammates? Can you even estimate it? Rondo´s not exactly spacing the floor, you know?
What about the fact that opposing defenses know who´s going for the killer pass and can adjust accordingly? Could that potentially increase total turnovers, especially in tight games? What about KG and Pierce, do you think they played a role in Rondo´s "conversion rate from passes" stat?
I could go on, that´s only scratching the surface...
Once you figured all this out, then put his conversion rate on passes in relation to the league average, converse it in total, absolute point increase on average, compare the increase with a hypothetical scenario where, say, Kyrie Irving (as an example for a scoring pg) played the point for us (I know, that´s unfair), optionally weigh the seperate assists (and shots, of course) from "up 10 in the first" to "down 4 in crunch time", maybe you can come back and explain how his "play-making" ability justifies his usage rate...and even more importantly, almost certain salary increase once his contract expires.