Well, to play devil's advocate here, this article's reason the 10,000 Rule is not true is because it doesn't make experts.

However, he never said the 10,000 rule would create experts. He said it would create proficiency.

It's become a major theme in society (especially online at places like Reddit) where someone misunderstands a statement, and then promptly attacks or disproves it, instead of asking the person for clarification first.

If there is one thing I've learned over the years is people tend to be well intended, and by asking for clarification, one has more of an opportunity to learn than shutting it down immediately. At worse you've learned where they're coming from, which imho is more valuable than the initial statement itself.