And we do know that coffee without caffeine is healthier because as I said the component in coffee which is associated with the health benefit has been found. I cited a source to that as well so just isolate that compound and why do you even need caffeine or coffee?
That is still far from certain. Like I said without further research we can't say that.
Okay so we need a study which compares the effect of coffee vs the effect of the isolated chlorogenic acid? Cool. If the study were to show coffee is producing a better measurable effect my opinion would have to change but right now we have no such study so your jump to the conclusion that coffee is healthy is a leap of faith.