I don't know about the claim of 20% but I fully understand where you're coming from. You can usually tell who lacks that intuition when they have a problem. They come to you with a problem: thing X isn't working. "Well, what have you tried so far?" you ask them. "Oh, nothing. It's just not working."

They see the world as "thing works" and "thing doesn't work" and never stop to wonder, "why?"

Someone with logical intuition might first think, "Well, it was working earlier, what's changed since then?" Even if they possess none of the knowledge to fix the problem themselves, they may be able to come up with some theories as to why it's not working.