Cars that require the driver to pump the brakes should not be on the road. Cars without ABS have shorter stopping distance than cars with it (yes, more control, but this is California we are talking about, the road is always dry).
This conversation also has me wondering, how many people don't understand ABS (not you). What I'm getting at here is how many people drive in a manner that has them constantly activating their ABS system...
But if you don't have those preconditions, ABS will likely shorten the distance. Many drivers never had the training and practice to modulate the brakes for maximum stopping while maintaining heading.
But there's 100+ years of regulatory practice to allow vehicles to continue on the road as long as the meet the standards when they were manufactured.