I think that one of the worst things we can do, when it comes to anxiety in children, is not actively give them the message that it's okay to make mistakes, and that it's okay to fail. Because we all do it, and we all need to do it to learn.
I think fear of failure is one of the most emotionally crippling things a person can have.
There is so much pressure put on children to succeed now, to pass every test, to excel in every extra curricular activity, to be outstanding. To look great, be clever, to be popular, to be interesting, to be good at sport, artistically talented. . . and if their parents aren't doing it, then social media is. Which means that they internalise these messages, and feed them to themselves.
I'd hate to be in some kids heads, they must be their own worst enemy when it comes to the negative self talk. And if this is reinforced by their parents. . .