Telling someone they smell bad, or they are fat, when they ARE, is NOT an insult, correct. However, calling someone something they are NOT, such as calling someone fat who is not, or calling an adult a child, IS an insult. I'm not sure where you live that you think it isn't.

You didn't give a right click vs left click example. All you said is that it's some people's opinion one is better. Nothing on how it will work in your version.