The Agile Manifesto describes a set of ideals but gives no true set of instructions to follow, to do so would not be the Agile way. More than anything, it prescribes an attitude around which you should generally approach things.
Scrum conversely gives rules for how things can be organized and executed in a functional organization. It gives little room for flexibility. Any problems you have with Scrum, the first reaction should be "how are we following the rules wrong?".
Similarly, Tao and Agile are ideals for the individuals (and small teams), Confucianism and Scrum are rules for getting things to work functionally within a society/company.
Morality is society's rules for individual survival.
Ethics is the individual's rules for society's survival.