Legal question about Antique vehicles and the seat belt laws

First of all you seem to have thrown the "Wet Road" part in after the fact there bud but in the simplest terms I can muster for you , Braking is friction . Maximum friction equals maximum braking equals shortest stopping distance, all 4 locked up is maximum friction . ABS pulses the brakes allowing the wheel to continue rolling which provides better steering control while braking but lengthens the actual stopping distance . It's physics , threshold braking is also better than mechanically pulsing the brakes .Hydroplaning is not a given on wet roads , it is generally caused by the tire not being suitable for the conditions either by design , compound or pressure , I run the Nitto NT555R which is a wet rated and highway rated "Drag Radial" , I have been in torrential rains where I could barely make out the shape and lights of the semi in front of me without even a hint of hydroplaning but this has nothing to do with the myth that ABS stops better .

I cant let this go like this since it is a bit misinformed.

In general you want your brakes to stop the car and your tires to hold the road. You want your tires to transfer as much energy to the road as possible. and the best way for then to do this is if they are rolling with the road, and not sliding on it.

There are 2 type of friction out there static, the force needed to overcome an immobile object, and dynamic, the force needed to keep an object moving. when you are driving down the road your tread is static to the road, that is it isn't rubbing down the road it is rolling on it. When you do a burn out or slam on the brakes and your wheel is turning at a different speed than the pavement that is dynamic friction. Static friction is always more than dynamic. IE in a burnout it doesn't take as much torque to get your tires spinning as it does to keep them spinning. If you thing that spinning your wheels puts more power to the pavement then why would you not want to "burn rubber" all the way down the track.
and the same goes for braking when your tires are locked up and not rotating you are not braking as well as when they are rotating with the pavement. Its just physics.