I wouldn't exactly say anything implies it is rare. 400,000,000 million people possess any particular trait at a greater prevalence than 95% of all people. It's more common than being an American.
You make it sounds like he choose to be insecure about it.
It's social conditioning and ego doing it's thing to create pointless suffering/insecurity as usual. Nothing new. It will keep creating suffering for pointless things. The dna % just one of the mere labels it uses.