Thank you for making my point...both really."Cole and any other good pitcher get better with age. They get more intelligent." It really is not this clean cut man. IQ while it is important pales in comparison to developing a third and forth pitch. There is really far too many variables to just chalk it up to one thing, I think you are extremely off base in claiming @nemeth#5 knows very little about baseball lol. When you say stuff like that you just come off like a tool because we all know well that is not at all true.
Yes offensive production effects a pitchers record but it does not impact his ERA does it? Or how hard he is throwing? Yes errors impact a pitcher pitch count and can impact runs scored but it does not count against his ERA. When you are dissecting a pitcher you are really not looking for numbers that are out of the pitchers control. The schematics of pitching also pales in comparison to teaching pitchers a better release or balance, things related more to delivery, the non tangible things that are not recorded in baseball are more often in not the most important things.
Lack of offensive production you damn well better believe hurts an ERA over the course of a season.
As I said you must pitch differently at different times without offensive support. It's not the errors that impact the ERA directly but the what if on am error happening that makes you pitch defensively. The lack of offense makes you pitch defensively. Not just in one situation in the playoffs mind you but every damn start you have to pitch defensively. Why? No support. Just like the defensive plays that don't happen on your behalf. They aren't errors if a player has less range. It just looks like a hit.
There are many factors outside the tunnel vision that go into MLB pitching that impact many stats like an ERA. I have relation that was a good Pro pitcher and trust me when I tell you it's not as simple to just pitch for the Pirates as the Red Sox or Yankees.