The guy may not even play, but he's still one of "the best players" in that kind of condition? Erm, okay.
If Kyrie doesn't play, we are down to a 7 man rotation and one of those 7 is James Jones.
Do you really think that a hobbled Kyrie who still gave us 10/6/3 is less effective than throwing Mike Miller or Joe Harris out there as a new 8th player in the rotation?
Delly was 0-6 in 25 minutes. Without Kyrie he probably has to step that up to around 40 minutes.
Even injured, Kyrie spaces the court. Here are Delly's shooting stats in games he played 35 or more minutes this year
12-26 vs Magic: 8 points on 2-7 shooting in 36 minutes
1-5 vs sixers: 3 points on 1-7 shooting in 39 minutes
1-7 vs Rockets: 9 points on 3-8 shooting in 35 minutes
2-27 vs Pacers: 14 points on 5-18 shooting in 38 minutes
3-1 vs Rockets: 3 points on 1-4 shooting in 42 minutes
4-10 vs Celtics: 9 points on 4-8 shooting in 41 minutes
5-6 vs Celtics (playoffs): 9 points in 3-8 shooting in 36 minutes
We were a combined 2-5 in those games.
It's a snowball effect. If Kyrie is out, Delly has to play more, gets fatigued and is less effective and someone else has to back him up, who is less effective than Delly. Also our floor spacing is gone, which makes it easier to defend LeBron, who already is carrying the front court load for Love being out.