I like your answer, first because in 3000 years there's likely never been a person who has absolutely mastered Go, but the potential level of Go mastery will be limited by the interplay with opponents; perhaps Go can be mastered by individual Go masters once we have as Go-playing species developed the potential for Go mastery. Refutation of what I previously stated: A (19x19) game whose outcome is measured by greater area of possession following 2.082x10170 possible positional places of which >1% are legal requires more memory than can be stored by the human brain, much less processed, which would require all possible legal positions be thought in relation(multiplied by) to all other legal positions(=sum(all legal positions)-1). Mastering Go -having all possible knowledge of the game- ultimately requires a player possess more possibilities than the total number of atoms in the visible universe. While it may be possible to be objectively the greatest Go player in the world, that is merely approaching master and not mastery itself, the game is irreducible to an algorithm.
I disagree that go is easy to learn; I had the fortunate and unique experience of being taught the game while attending university -at the time a 4th year philosophy student- over several hours and rounds while simultaneously peeking on 400-600mcg LSD-25 and 120+mg adderall, a very highly stimulated nervous state of pleasant confusion and intense focus -the absolute ideal state in which the brain is ready to be programmed. In the time between putting down this my first season of go I found myself asking at what point did I cease merely deciding where on the grid to place stones of one color hoping or supposing placement at that position at that time would tend toward determining an outcome in which I may be declared winner of the game and what point I had sufficient knowledge to analyze the potential outcomes of different series of moves such that I could make meaningful decisions affecting desired outcomes in how the game would play out. I think since then that I've observed in opponents(friends) an inability to pass that threshold for n-many games; I didn't see them as playing go, they still hadn't learned to play go, only to participate, in a primarily passive manner, in ongoing games of go that were being played out. It may take weeks, even months before they can be said to actually be playing the game of Go. That's the thing with go, it will always play out, stones being placed at random will play out a game of Go, but you wouldn't say of random-location stone places that they are playing Go merely because their placement of stones happens to be on a Go board. I think initially conceptualizing a game as complex as Go is difficult, therefore it is not easy to learn the game of Go even though it may not be difficult to participate in a game of Go being played out.
TL;DR: learned to play Go while tripping hard and realized learning to play Go is actually really <expletive_omitted> hard to learn; mastering Go, Im sure that's even possible. You should play more Go, that game will make you a lot better at abstract thought and it's fun, too.