The Owens Stanley's were impediments for all aircraft throughout the war. Even after the war ended, planes were still dissapearing ito the mountains. The islands of the Halmereah's and Celebes had high enough mountains that made navigation over them dicey.
The raids against Balikpapen in 1943 and 1944 were of 1300-1600 mile missions, one way. The there were the raids from the PI against Vietnam that were long enough to as not have fighter escort. There simply were not enough P38 groups available to cover every missions.
I'm, not referring to those islands. Although, I would like to point out that the PI has some impressive mountains in the north.
The missions over Europe were simpler from a navigation standpoint. If you got lost, you just had to fly west and dead reckoning would put you over the UK. If you had the "balls" to go low enough, you could pick out geographic features to get an approx. fix. In the PTO, you didnt have that luxury. The jungle and ocean all looks the same. And the jungle was bad enough that even if you crash landed a couple dozen miles from your base, survival was still dicey.
I never stir the pot. I make people prove their points beyond a doubt.