Is that what you are going to tell your kids when they don't do so well on their math test. Let's say they just started learning multiplication and they haven't grasped the idea of it yet. You will just tell them to stop trying? If they don't get it they won't ever get it? A lot of situations in life, practice makes perfect. There will be those people that are already good at it, but if someone try's hard enough they can be just as good as that prodigy or a little below them or even better.