I think he said that.

The campmates chose who they thought would suit the trial and do the best. Rebecca was this person and in the end managed to get ten stars. I think they would be starving, if David did do the water trial.

He did go on a bit though

^^^ this

He might have liked it but he couldn't have done it anywhere near as well as Rebecca.

"people are getting a bit opinionated and that's dangerous" ROFL pot kettle.

I wonder if David would have liked a crack at that trial...

David would have done well to get half the amount of stars she got