My partner has VSS and constant migraine aura(20+years) and she's the safest driver I know. Only one accident in nearly three decades of driving, and that was when someone else wasn't paying attention and rear ended us when we braked to avoid another driver suddenly crossing an unbroken line way too close to us in front, so, none of it was her fault.
You can't generalise like that. Sure, some folks with VSS won't or can't drive, I'm sure, but there will be millions out there who are perfectly safe behind the wheel.
Out of the two of us, I'M the one who doesn't drive, because my anxiety is too bad. You're safer with her, whether she's seeing static or oilslick rainbows or starbursts that day.
Tl;dr, whether he's to be trusted around the silverware is up to a jury, but BK is entirely likely to be fine behind the wheel if his VSS hasn't led to him having accidents over what I assume is over a decade of driving. As far as I know, the only traffic issues we know about were him rolling into an intersection and following too close, which a large proportion of drivers are guilty of doing at times.
MOO