It takes a huge amount of skill, its just that you do /leave if the games you join have good players in until you find a game of randoms, so everytime you use a bow on people they stand still and let you shoot them into the void, which gives you this false impression that bow chaining is something easy.
Play against real players and you will see that your delusions are exactly that, delusional. You will realise that it takes many many shots to shoot off real players in a game, they will place many blocks, strafe the arrows, and of course use shields. Possibly TNT too as arrows can't pass through ignited TNT (you probably didn't know this either). And this is just 1 player on their own, try fighting a 1v4 with only 1 bow shot per 2 seconds, you'll find that your little manifesto is total nonsense.