Memes

Yes, that is what it means to be a principled person. Life is ephemeral and temporary, and you'll die a worse death from cancer or Alzheimer's than you will through violence, to start.

Life's not all about you and your ability to continue shoveling food in your face and arguing on the internet. You are a social animal and therefore you have a moral obligation to put others before you, especially in violent situations where someone else's life may be in danger.

Is your life more valuable than anyone else's on that bus?

What happens when the brat starts harassing other passengers (which they do, all the time)? Threatening or hurting people? Sexually assaults someone?

Do you intervene which would protect the others regardless of whether you win the fight or not? Or do you tell yourself your health and livelihood is the only thing that matters and try to justify your cowardice by convincing yourself the cops will somehow magically appear on a moving bus and stop him before he kills her (the victims are typically women)? Even knowing the fascistic and abusive tendences of police, and how they often don't protect people from violence?

You're not just a coward, you're a selfish despicable piece of shit.