We don't need KD in the regular season; we just need him in the playoffs.
I don't think the Raptors are a great team but there is a chance that no playoff team next year will be as good as this year's Raptors. The other teams also have salary cap problems and players that might leave and Chris Paul getting older. Maybe the Warriors can compete without KD in a down year.
I wouldn't say that's true unless the Warriors can get a guy who would give them 25 minutes and hit the corner 3 at least at 37-38% clip, rebound a little and of course defend.
Unfortunately guys with proven record to do the above would be more than what the Warriors could fit under the cap.
Because otherwise, Curry and Klay will get blitzed all season long and they may need to play more minutes, for the team to try to get 50-55 wins.
As they age, they're going to need more help, not come back into games to find the second unit put them in a deeper hole than when they went to the bench.
Of course Kerr is going to use load management at all costs anyways.