It's really not an interesting argument.
The team without Kyrie or Hayward would be worse.
There's no way the offense would be better than bottom third of the league. The defense might be similar.
My guess is they'd be hanging right around .500 in that case.
You'd still have issues with Tatum and Brown struggling to make the leap while Rozier and Morris gun for their next contracts.
Horford would still be a season older.
I don't think it would be pretty. But hey, the expectations would be lower, so I guess we'd all be happy, right?
Kyrie has missed 5 games this season. For what it's worth, here are Tatum's and Brown's numbers from these 5 games:
1/14/2019 @Brooklyn
Tatum: 34 points (on 12-19 shooting), 5 rebs, 3 assists
Brown: 22 points (on 9-18 shooting), 6 rebs, 0 assists
1/4/2019 vs. Dallas
Tatum: 18 points (7-21), 6 rebs, 0 assists
Brown: 21 points (9-15), 2 rebs, 2 assists
1/2/2019 vs. Minny
Tatum: 8 points (3-11), 3 rebs, 4 assists
Brown: 10 points (4-7), 5 rebs, 2 assists
12/10/2018 vs. New Orleans
Tatum: 21 points (10-16), 6 rebs, 1 assist
Brown: 19 points (6-16), 7 rebs, 3 assists
11/9/2018 @Utah
Tatum: 21 points (7-14), 3 rebs, 4 assists
Brown: 9 points (4-17), 4 rebs, 1 assist
overall
Tatum: 20.4 points (48.15%), 4.6 rebs, 2.4 assists
Brown: 16.2 points (43.84%), 4.8 rebs, 1.6 assists
Btw, the C's are 3-2 in these 5 games (lost @Brooklyn and @Utah).