I've trained bjj for 7 years and muay thai for 15 years. In both I have trained with world champions and I have come to a simple, stark conclusion.
Anyone who says either art is simpler than the other doesn't know what the hell they are talking about. They are both equally complex with an equal variety of moves, methods, and strategies. In both raw athleticism can allow you to cut corners so to speak but you should never do so. Both are reliant upon the four factors of effectiveness for use and both teach all four.
That is not dead which can eternal lie and withs strange aeons even death may die.