No they're easy to use. They're hard to master. Git is hard to figure out how to even upload to.

Depends on the instrument. Anyone without experience or instruction is gonna make a fool of themselves picking up a wind instrument. You need to train the muscles in your face and mouth to form the correct embouchure needed to produce a clear note.

I see the point and I wouldn't want to belabor the metaphor, but I really feel like guitar is actually extremely difficult to even get started with. Between the awkward stretching of the fingers, how difficult/painful it is to hold down strings hard enough (and close enough to the fret) to get a clean, clear note, and how hard it is to hold those strings down in such a way that your fingers don't brush against other strings, I'd say guitar is crazy hard to start. I'm saying this as someone who has been playing and enjoying guitar for decades. Beginners have a rough time of it for awhile.

Git is much easier to master than the piano. I played piano for years and can only just play two-handed melodies if they aren't well-aligned.

I've read a few blog posts and half a book on git, and I don't remember the last time I had issues with it.

I also don't recall a junior ever having trouble uploading files with git. Unless they're in an interactive rebase, which wouldn't happen your first time trying out git.