Even with those extra 1200 innings Galvin managed to put up almost 20 fewer War than schilling. I get peak vs longevity if the longevity tallies up more value than the peak, but that's just not the case here
Schilling was a victim of bad relief, he had something like 40 games where he left with leads that got blown. Every pitcher with similar stats regular is in the HoF already. On top of that add what might be the best playoff numbers ever. He should be in already but actually lost votes this year.
I watched the guy who run Sabr on the MLB Network tonight, he said that what he thinks happened is that voters went for the locks (Maddux, Glavine, and Thomas), and the guys who needed votes to stay on the ballot, and thus drained votes away from the guys in the middle.