"Low Band "apply question

What is important is that the tires do not grab DURING or immediately AFTER the shift. That is where the shock can break the overrunnung clutch.

OK how in hell is anyone supposed to have any control over that?

you leave the line/ stoplight/ launch on a back road in 1st, and it spins

FOR AN INDETERMINATE TIME

At some point it either stops spinning, or you / it shifts into second when

IT ALSO might / probably will spin FOR SOME TIME

It might stop spinning immediately or not, depending on traction.