I know. Winter tyres give much more grip on snow. So no matter how inept a driver is, winter tyres will definitely help.
And no matter how good the winter tyres are, they won’t make up for a drivers ineptitude. The driver’s the crucial component here.
How does 4×4 improve braking and cornering? It’s good for getting moving but getting moving can be just the first step in your crash.
4×4 gives a huge improvement in cornering performance in adverse conditions, but I know what you’re saying. It can give a false sense of security as it doesn’t making stopping any easier. Engine braking may be improved, I don’t know but that’d be a moot point I think.