The higher up, the more efficient the player is in isolation points per possession. The further right, the more difficult/guarded the shots are. The further left the more wide open/easy those shots are. Killian is getting the easiest shots out of anyone in the entire NBA right now and missing them and that also means, as we all know, that defenses are focusing on the other 4 guys and letting Killian have his (and he still isn't converting.
Impressive position for Banchero, who looks like the likely runaway ROY right now. Haliburton also super impressive, with the third highest ISO efficiency in the entire league and overall he's making harder shots than most players have to make.