As I looked back over the different takes on instruments in this thread with the ability that it takes to master them, there's only a few who feel that percussion hasn't been recognized as a difficult to master, or at least to become proficient in the playing of music.
Only Nimbly in post #67 alludes to playing the drum(s) is a difficult musical instrument to master. And there are others who have supported the idea that it was the first instrument that many might have used in the production of music...taking this term in the broadest interpretation.
For instance, take Neil Peart of "RUSH" fame, who some regard being the greatest percussionist of all time, due to his complex, exacting ability to be part of this highly accomplished group. And before Peart, there were others who stood alone with the ability to awe listeners, as some regard the drum as being the "heart" of a band.
Some genres, as in Scottish music, the beat of the drum has to be precise in order for several drummers to carry off a Piper tune. As well, when recording, the percussionist has to be "bang on" being able to reproduce the same amount of beats each time a take is made while being recorded!
Q