note that as IQ goes up, in the general sense, tha capacity to obtain multiple doctorates, et al, goes up notably.
Sometimes it's just a few extra classes or maybe a year of slightly different studies, as much can be parallel at such levels.
Ergo, the existence of the renaissance human, the multidisciplinarian.
The gods of physics and the sciences, the Da Vincis, the Newtons and the like.. that stomp around in 7 league boots across multiple fields, willy nilly, discovering things that the more limited cannot reach and invariably ridicule.