That actually sounds awesome to me! I don't know if I missed the point, but I'm guessing you mean it's stupid because it doesn't exist? It should exist!
A launched Giga coaster does sound interesting! I think the reason why the kids were accused of saying stupid things is because they had this idea while at Silver Dollar City and not at Worlds of Fun. So, they may have been confused as to which park they were at or they actually meant a launched giga coaster should open at Worlds of Fun.