Hate to be pickey, but that is simply not the case. If it were true, ABS would never work on gravel or snow as little pressure needs applied to lock wheels up. Having said that, IRL ABS systems are programmed to detect panic stops but even then it is more a function of brake pedal acceleration than it is pressure.
The question at hand needs a short novel written to explain why it is and is not effective... and under which circumstances, and how to read the road and vehicle attitude etc. etc.
In the game, with ABS set to 1, slamming the brake to 100% power is safe and easily repeatable, and thus is a fast and consistent way for the masses to play.
For drivers with more "feel/finesse" the brake pedal will rarely be "on the floor" as even in the game true threshold braking offers more braking power and control... much the same as traction control.