Well, having both rear wheels pull also means it is less likely that they will break traction, so there's that. You could make the same argument about pulling both rear tires in a muscle car. It can make a car 'fish-tail' or swerve hard sideways when the tires spin. Just look at the rustangs leaving car shows. Open rears are much less likely to do that. Would you also caution against sure grips in muscle cars, too?

The driver is the key here. Sounds to me like some can handle sure grips..................and some can't.