Why does signing a funeral card and saying the person's not really dead in remembrance wrrant  that others are to re-write something nicer?

When I was in school, I had to find a way to write on a card that was going to be on display for somebody's funeral at the time. I was at school and at first I suggested a Star Trek line.

I forgot whom the person's gender was but the rest was "not really dead as long we remember (name of person's gender)" when this teacher Mrs. or Ms. Wright, wasn't happy with what I wrote and made me re-write. What a empty headed gesture on their part to stifle my creativity.Canada is a land of their own national sense of creativity. Anne of Green Gables would not have been conceived without the very concept and already I was stifled by Wrights and Woodlocks. First, I was told during art class on rememberance day that stick figures with guns were not allowed, next I was told that my comics about addressing an upset had to be made just right without any of my characters banging on the walls, next in high school back home, I was next told that my story had to be rewrit because the teacher didn't want references to crotch kicking and now this one, where my Star Trek style line helps me avoid this feeling that I had to write my sorries about death. My sorries and poems can rest in peace anytime.I'm outside school now, and there's not much to experience because I go to work for money. My creative ways of signing a funeral card won't be a problem now since I'm not a student in school. I wrote a statement to the question because of the experiences in my life that I can never ever forget.