I could understand this for Cruz - maybe, and if Trump loses everything remaining. But it is mathematically impossible now for Kasich to get the 1237. It just cannot happen.
I’m not even talking about Cruz getting the 50%+1 (I don’t think that will happen). But he may think that he can get the other delegates on a second ballot.
And I don’t think it will happen, but it will be terrible if somehow a Romney or Bush becomes the nominee.