It demands willingness to discipline oneself for the sake of others. Etiquette has sometimes been questioned because it can as a substitute for kindness or gratitude. But the one who pretends to a virtue has lacks is not as dangerous to society as the one who convinces others that virtue is unnecessary. The greatest value of etiquette is its value to the individual. Good behavior may be useful to society, but it is part of man.
Manners make the man.
It is part of your character and you can't escape it or leave it behind. Good manners in public are perhaps more than anything else the mark of a civilized people. Without them, what should be perfectly normal action, like sitting on a bus or waiting in line of a ticket can be turned into a maddening experience. A Muslim sister is never loud and she speaks in a soft voice, especially in public. We are taught by the Messenger of Allah that the mother molds a civilization.