This stats argument is just ridiculous. Advance stats are just stats, all a stat does is measure something. You're feelings are valid, ERA, W-L, all those stats tell us something, just like FIP, wRC+, and Z-contact% etc etc. All stats matters guys! honestly, it doesn't make sense to discount something just because you don't understand it, which seems to happen at times.
There's no GM/POBO/Front office on earth that looks at a guy and uses a singular stat to judge them. Being able to measure different things tells you more,it's more information, and more information allows you to make better judgements and predictions.
One of my favorite examples of this was Jarren Duran.
And old schooler might of looked at his .195 batting average in AAA and thought "this guy SUCKS" but he was squaring up, and hitting the ball hard. The totality of the picture said this guy was getting unlucky with the number of hits he was getting but was hitting the ball well. He came up to the majors and IMMEDIATELY was getting better results.
ERA is nice, but how much can ERA differentiate between having the best defense and the worse defense in baseball behind a pitcher? Do you want to chalk that s*** up to Voodoo, magic and just believe it's all somehow the same? we've been complaining about defense in here. DEFENSE FOLKS!!!! defense matters, if you truly believe defense matters then how can look at ERA without considering how defense might influence that stat? why WOULDN'T you want to know how good a pitcher really is when comparing pitcher A to pitcher B.
It's not that more conventional stats don't matter, or don't tell you something, or aren't important. It's just an incomplete picture. Why would you want incomplete information. If you were wronglyfully accused of murder, would you want your defense lawyer to use a narrow set of facts in the defense and when provided with cameras from different angles and other witness, facts that might help you are going to want those things employed or not?
It's that line of thinking that got Bartolo Colon a CY-Young award over Johan Santana in 2005, who was CLEARLY a much better pitcher.