Because Apple does not want anyone profiting off their platform without getting their cut, as that has been a significant factor in their rise to one of the wea

Because Apple does not want anyone profiting off their platform without getting their cut, as that has been a significant factor in their rise to one of the wealthiest corporations ever in existence, and as well - none of the major game producers respect Apple well enough for their own game development efforts to want to cut the 30% checks that Apple demand. Apple simply haven't done enough to their platform to warrant that reward, I think, in the minds of many Game Company CEO's ..