Sometimes, being silent, and walking away, is the best response. People trying to prove each other wrong, which is what arguments are all about, leaves no one any better. Let’s remember that people do things their way only because they feel what they are doing is right. To an observer, or to someone who is at the receiving end of any action, it may well be possible that the action is questionable or inappropriate. When an argument follows, reviewing the merits of the action(s), it will always be a case of who was right than what was right. So, in all such contexts, when you find yourself in the midst of such an unwelcome, pointless debate, exercise your option to not say or do anything. Just let things be. Don’t even opinionate in your mind. Don’t even console yourself or justify your actions. Just choose to be silent. And that is not an act of cowardice.
Walking away from a futile, distasteful argument, which is unnecessary in the first place, is not cowardice. It is intelligence.
This does not mean you must not fight for what is right. It does not mean either that you must not make your point strongly. What it means is that if belaboring what is evident and must be understood upfront is going to cause people to experience each other badly, then such a reaffirmation or reiteration is futile. Silence is a great option. Try using it! It always ends the spiral of negativity and suspends hostilities even if it immediately does not deliver a resolution.