Perhaps you have bought a product through the internet which turned out to be poor or average quality and you had to spend extra time and money returning it. It’s almost certain that if this happened to you, you wouldn’t buy this product again or recommend it to someone else.
If we mention what is “average” the list is long. For example services, companies, projects, relationships, and all the things that are not done with excellence. If people have the ability to achieve a high level of excellence, why do many fail?