Don’t know a lot about cars do you?
Front brakes are 80% of your braking power so yes, you definitely need them.
Better analogy would be the old single reservoir master cylinders so that if you get a leak, you have zero brakes. Since the 60s, they’ve been dual reservoir, one for front and one for back. That way you have something if one end or the other leaks. Preferably it would be a back leak because back brakes only are near useless, especially on a pickup truck with an empty bed.
True enough. So instead of having only back brakes make it only having front brakes in my example.
So who needs rear wheel brakes, the front wheel brakes could be made to safety stop the vehicle, rear wheel brakes are a safety feature, something they should have added in to the Max with a second flight trim indicator IMHO. -Tom