Why do you think some cultures try to force children to be right handed? Do you think it's a good idea?

I think some cultures try to force their children to be right handed because maybe they think being right handed means being stronger. Or maybe they say that if you were right handed, you would be able to survive and live a long time. So maybe that's could be why they force their children.
I respect their belief , but i don't think it is a good idea to force someone to be something that he or she is not.