Yeah, but Sainz is not an Alonso. I rate Sainz high, but still if you want a driver like him, there are at least 5-6 options, maybe more. You can go with any of those and get similar results so you don't have to find a way to make peace with him. However, if you want an Alonso, you need Alonso. There are no alternatives so you either make peace with him, or you won't have it.
That's the difference between the good and the great.
To get back to somewhat ontopic. This is exactly the reason why RedBull kept Max against Sainz. One is unique, the other is replaceable. If they decided to side ways with Sainz back then, I see no reason why to go back to him now.