My argument was that he's not a 4, especially on Defense, (and let's be honest, that's the bread and butter of all lineup discussions). I provided some clips to show why that would be problematic.
Happy for you to provide videos, evidence to the contrary.
Bringing in Keldon or McD to the discussion, (widely acknowledged defensive liabilities, who also just happen to be Spurs), to prop up an argument that we should sign Smith as a 4, (currently unable to play that position effectively, also not a Spur), just because he can be as inept defensively on the perimeter seems somewhat counter productive to me.