It should be easyenoughto identify CC children and test whether or not they trust their parents. The experiment is not complicated. If it has never been attempted, maybe the hypothesis is not that credible.
If you can't even be bothered to show that there is evidence that supports your claims, excuse me for not believing a word of it. My DC and others I know in RL are counterexamples to this "theory" of yours. If you call yourself a scientist on any level, you should know that even one counterexample disproved a theory.
Some minutes of crying over only a few days does not break trust between mother and baby, any more than holding them down to be vaccinated or leaving them at nursery in maternity ward does. It is ridiculous to claim that a loving, caring relationship where he is nursed, loved, kept warm, sang to, kept clean, kissed, and cared for will be reduced to nothing because he cried for some minutes 
As for "Is CC good for children?" - it teaches thhem to sleep well, which is a very good thing. Sleeping baby means well rested parents, which means better, more patient, more resourceful parents. In the absence of any evidence that it harms them, yes, it is rather obvious that CC is a good thing.