Why do people want to play a 33 year old Antawn Jamison as a small forward?
That is like playing Garnett as a small forward only without the defense + less of a mismatch offensively.
Talent.
Plus, the scenario I was proposing was probably something closer to 5-10 mpg. I mean if KG and Perk each get 30 mpg minimum in the playoffs, that only leaves 18 mpg for Jamison and Wallace. The only way to give either of those guys more minutes is to play Jamison some at the 3.
Is it ideal? No. However, is he probably a net gain at the 3 over Tony Allen? Likely. Moreover, if Doc picked and chose his spots, he could have Jamison matched up against guys backup 3s who likely aren't going to exploit any defensive deficiency he might have.
And let's face it, if it comes down to having Jamison or TA on a 6-8 small forward, does Jamison really give up that much more in quickness than TA does in strength and height?