+Kabuki Kaiser – You’re right, but only to a point. You said:

“[…] knowingly hurt others’ feelings for real…”

It’s the “knowingly” in there which is key.

Sure, you would be a jerk if you made fun of your friend’s mom passing away. But how would you know if you shared the table with a rape victim? Someone with an invisible mental illness? Someone who was struggling with suicidal thoughts? If they haven’t told you, you have no way of knowing. The X-card protects you against accidentally stepping on someone’s feelings in a way they wouldn’t want to experience in a pleasant, fun, safe pastime like gaming.