it is the banner of the Arahants and enables them to be devine messengers (the messenger of the path the fourth the Buddha encountered as a Prince before he left the household life).
It also physically embodies the homeless life, making a separation between spiritual seeker and those living the life of the householder.
This offering maybe right, or wrong, but it is one, the other, both, or neither!
Blog, - Some Suttas Translated, Ajahn Chah.
"Others will misconstrue reality due to their personal perspectives, doggedly holding onto and not easily discarding them; We shall not misconstrue reality due to our own personal perspectives, nor doggedly holding onto them, but will discard them easily. This effacement shall be done."