i have a few thoughts lingering in my mind for a few days now and wanted to share them with the other players, and hear their opinions on the topic since somehow it wont let me go

The Topic i want to talk about is "ghosting for Minor Reasons". As a little example:
Character A offends Character B by slandering him, mocking him, making fun of him, etc. Character B is MUCH stronger than Character A and knows it, so he draws his Weapon and starts fighting. What happens next? Character A falls back, and gets immediately ghosted by Character B.
What im asking myself is just, is this really the right approach for Roleplay itself? Is it legit to act that way just because you feel that you BELIEVE that you are in the right and the Game engine permits it? Is it the meta-knowledge that the other Character will revive at the cross why Players decide to let their Characters act that way or are they usually that "barbaric" that they dont care for other peoples lives?
Don't get me wrong, i don't want to offend anyone, but i dont get such an behavoiur. is it just to show others that your Character the "Uber-fighter" or what is the Reason to do so? Why not instead fight, let the Character fall back and rub his loss into him? That way Roleplay is made AND the other Player doesn't get salty because he has now repairs to do, Maybe lost some precious item and has to play in a way he maybe even doesn't WANT to? If the Character still has a big mouth after he fell back he can be still ghosted anyway as a last resort.
Usually i take RL as a reference when my Character acts. Meaning i DONT go around and start stabbing someone in the back just because he gets on my nerves or pisses me off, with the knowledge "Hey, he might die but he will be in a better place now like Nirvana, Paradise, Valhalla, etc" (at least if i were religious in any way) and ignore any other possible consequences to him or myself. Besides in my opinion it's not a matter of Real Life or Roleplay/Game but just a matter of common sense at all.
So let me know your opinions, expiriences, or just thoughts about it.
cheers,
Caine