“You are not [something] enough!”
By saying this to your children you are showing them a pretty restricted image of themselves. You are implying that there is something they are lacking in order for them to do what they love or be who they want to be.

Even though you are not saying that they are not enough, you are programming their mindset that way. They are enough to be themselves.

They always are. A tree is enough to be a tree even when it is only a seed. But it needs to grow in order to become what it is.

Instead of this, tell your kid: “You are enough to be or do what you love. But sometimes we all need to train or practice something before, in order to grow that way.”