As in other places that have very hot climates & very bright light, white cars were & are common in S. California. Being acclimatised to seeing everything available in white is perhaps the reason I have never disliked white cars like so many on this forum seem to.
I have been in a white 308 GTSi, a white 308 GT4, a white 246 GTS, a white Mondial, as well as a white Silhouette, a white Countach, a white 911, a white 914 & a white 930, white Bentleys, Rollers, Mercedes, BMWs & Jags, amongst other interesting cars.
Seems to me an unlikely that the Ferraris would all have been repainted.