However, they need heavyweight pilots, because when flown at low forward speed, especially at heights lower than 500 feet, they are susceptible to OGE - out of ground effect, which means in close proximity to the terrain at a low air speed or at hover, they fall out of the sky.
Flying and sailing make me nervous, which is why I walk everywhere.
These two quotes alone, I think, sum up the credence we should give the author on this subject; regardless of his standing in the legal profession.