Throughout all of this, you have managed to miss the point.
ERA is not a good indicator because it was so volatile that luck greatly affects it. That's why WHIP is better.
Then you went and made up some truly insane numbers that could never happen for a period of time longer than it takes you to suck Harden off.
Here's what would have to happen for your numbers to happen for 30 starts: pitcher B would have to just get hammered for about 10 starts allow where he gives up 20 runs per start and EVERY RUNNER THAT REACHES BASE SCORES. His remaining 20 starts would all be perfect games. I'm pretty sure that would win the CY Young.
Pitcher A would have to allow 4 base runners every inning and somehow avoid a run scoring which means that every inning he would need either a double play, a pickoff, a caught stealing or more than likely, an error. That's right the only way this is really possible over 30 starts is if he was the victim of 1000s and 1000s of errors. This errors would lead to runs - almost certainly more runs than pitcher B allowed. They'd be unearned runs, but they'd still be runs, and as some numb nuts stated earlier in this thread, the pitcher's whole goal is to stop runs from being scored. All these runs would cause fictional pitcher A to lose almost every game he entered, and someone with a record like 2 and 18 would not win the CY Young even if his ERA was 0.00.
More likely to win the CY:
Pitcher A: 2-18 0.00 ERA, 150 walks, 250 hits, 100 innings.
Or pitcher B: 20-10 9.00 ERA, 150 walks 50 hits, no extra base hits, 200 innings, 20 perfect games.
Pitcher A would have no chance in hell and no one would campaign for him. Pitcher B would be an absolute lock because true baseball minds would throw out his 10 or so horrible outings and focus on his 20 perfect games.
Go ahead. Make up some scenario where your numbers would win the CY for pitcher A assuming both must have 30 starts.