This statement doesn't seem to be true.
View attachment 7188
*Poss = Possessions
*PPP = Points Per Possession
**stats are per 36 min
As you can see, Mitchell is only getting 1 more possession in the pick & roll and is getting more than 3x the looks via handoffs. In fact, Mitchell averages a handoff possession every 3.33 pick & roll possessions vs. Fox who averages a handoff possession every 10.4 pick & roll possessions. Where are you pulling your information?
Just looking at the PPP specifically, Fox has been very ineffective in the pick & roll, and he actually ranks 9th on the team in that stat! Whereas Mitchell is 2nd on his team at 0.82 PPP.