I think sun visors are more effective as wind deflectors
Only useful as sun visors with the hood up which seems a bit pointless as if it's bright and sunny, the hood's down
Just my opinion having driven two Mogs with visors
To a degree I agree but when the sun is really low they are invaluable. By turning them up they cover the sun when it is just above the windscreen and turning them down covers when the sun is just below the top of the windscreen.
I also use a cap or hat and wear Rayban sunglasses with polarised lenses to reduce glare and the reflections off the windscreen. See photo below
