or you should read more carefully the way estimation is worded.
You speak about the importance of SB for you, where the estimation is an interval between two TSPs...whithout any importance given to any skill above all other. It's a little bit like an average between players having between 5 and 20 ODs...well that average is not always worth reading.
So yes the estimation is not accurate when you are searching for a specific kind of players.
And finally you are speaking about a skill that is sought after by some for PF/C at a high level, and many people does not even read the value of SB as it is very difficult to give meaning to somebody that at the end of the day will do 1.3Block/game rather thatn 1.1. I like SB, but was it worth the premium on your player ?