Pedantically speaking you may be correct about Numberphile, but many times Numberphile provided the exposure and critical nudge to follow up on a piqued curiosity. That did end up imparting new skill.

However I will push back on the claim that inspiration is not education. It may not be sufficient on its own when resources are not readily available. But now that they are it's the inspiration and persistence that are the missing magic sauces.