Why are elite athletes uncommon without training? Or artists? Or musicians?

Humans have the potential to become really good at some things, but that ability needs to be trained and honed. Some people are natural athletes or whatever, but even they can benefit from training their technique etc. Most people aren't naturals but can become pretty good with enough work.

The way you're wording this it sounds like you somehow think being expert at lucidity is everyone's natural right and that something is unnaturally blocking most of us.