This. Just don't loving insult people and life will be easier.
"don't insult people and no one will feel insulted"
well don't kill people and no one will be killed
and don't hurt people and no one will get hurt
if you always agree with people no one will disagree
It's not that simple. What you're suggesting is that humanity pretty much stops disagreeing on things and becomes one big hivemind with no conflict.
Humans are going to have disagreements, it's just our nature.
And disagreements quickly escalate into insults, murders, wars, you name it.