There is luck in chess, there is skill in chess, and there are actions that are neither and can still affect results.
Maybe. I cant think of any, but if there are, I dont think they invalidate the argument. Succesful maintenance of equipment though.. I strongly suggest its a skill. I think those good at it would ask you, what it is other than skill that allows them to be good at it, you know.
There is luck in chess, there is skill in chess, and there are actions that are neither and can still affect results.