I posted that the healthy component in coffee can be isolated but the unhealthy caffeine is the junk part of coffee. A pill can contain only the healthy part and then a proper study can be conducted but you cannot take this study as proving coffee is healthy.

Not being associated with negative outcomes is not the same as being the cause of good health. A proper study would look at each component or constituent in coffee one by one to determine if any of them increase the lifespan of rats or have some positive health benefit in an animal model and eventually a human trial. If a human trials shows something then I believe it if it's a proper randomized controlled study.

Reference
http://www.medicinenet.com/script/main/art.asp?articlekey=39532