Here's my non-gaming journalist, not-japanese-expert (I can't declare if they shot themselves on the foot or not), not really a Monster Hunter player opinion:
Monster Hunter is a series made for Japan (that's why we had a PSP one and a 3DS one now). Japan doesn't care about PC Gaming, it's not something they are used to.
I'd go out on a limb and say that the American Market is not a big part of the Monster Hunter sales. That's mostly Capcom's fault, as they don't release the games down here and when they do, they don't try to explain it to people that have not been playing the game for the past 7 years. In other words, Capcom doesn't care enough to waste resources on a PC version of Monster Hunter for the US market.