Anyone who goes all around talking about one thing that they did back in the 70s the way he does is hard to take seriously. That and anytime he's interviewed on the subject he'll be very clear that 'attempting to do his study anywhere on Earth would be impossible now'. Brings to mind how Jerry Seinfeld would never race anyone after he beat the fast kid decades earlier[0].

[0]https://www.youtube.com/watch?v=akANwligs2E