I cited sources just like you do. Anyone can compare our sources and decide for themselves.
Not all sources are of the same value. You linked to a website and cherry picked a particular study on caffeine (not coffee) and insulin sensitivity. It is not the same. Part of the problem we have nowadays is that people believe all sources are equally valid. They are not.
So are you saying my assessment is wrong and that you'd get more of the good stuff drinking cups of coffee with caffeine when you could take a pill which isolates the good stuff without the bad stuff? I don't see how our options are mutually exclusive. We both could be right but I would be more right because whatever good about coffee isn't caffeine.
This is like whatever good about wine or beer isn't alcohol. This means you are better off taking a pill than drinking wine, beer, and coffee daily. Tell me how I am wrong? My sources on caffeine being harmful are as right as your sources on coffee but the difference is I also gave a way to get the good from coffee without the negative while you don't.
So the evidence says we are both "pro coffee" but one of us is "anti caffeine" and because coffee always has caffeine I would say take a pill. Get the most good with least bad is my stance.
I'm saying we don't know because we don't have the research to do that. I'm not sure how much simpler I can make it than that.
I have but you don't seem to understand.
No they are not. You linked to one study (in 12 people) which said that caffeine lowers insulin resistance when given intravenously and you linked to a website. That is not the same as being harmful. Further that says nothing about any of the other potential effects that caffeine has or for that matter how it interacts with other compounds.