I don't think Park needs me to speak for him, however, I did the same last season in D2. Its almost always the right strategy to normal game 2, and crunch game 3, especially when you're at home.
It went wrong for me but I still think its the "correct" strategy. Had Park won yesterday, and it was close, the enthusiasm boost he would have had today would have been substantial, and he would have felt he was a big favourite to win today, even on the road.
Of course I suspect Park thought, as I would, that Elmacca wouldn't crunch. And Elmacca knew Park wouldn't.
So congrats to Elmacca on his win. Commiserations to Park.