I think maybe drivers interpret a more unpredictable rear end with snap oversteer.
I've spun out unpredictably at turn 10 at Laguna Seca. The one with a lot of camber. It's not snap oversteer, but the sensation is not totally unlike the rear end fishtailing on my old 240sx during autoX, that didn't have the suspension sorted out (and poor tuning with difficult throttle modulation).
https://en.wikipedia.org/wiki/Laguna_Seca
I think what to strive for is predictable rotation, minimizing understeer. Probably this means a number of variables including driving experience and tuning the suspension that works best for you.