Do you have any studies and statements from respected researchers within the field to support your statement?
Just listen Nancy..
Failure is simply the incapacity to maintain the required amount of force output (Edwards 1981, Davis 1996). You need to maximally stimulate muscle growth you need to create as much fatigue and damage to a muscle as possible. This is in accordance with the work of famed sport-scientist Vladimir Zatsiorsky who wrote that a muscle fiber that isn't fatigued during a set isn't being trained and thus won't be stimulated to grow.
Taking a set to the point of muscle failure ensures that this set was as productive as it can be. Remember, simply recruiting a motor unit doesn't mean that it's been stimulated. To be stimulated, a muscle fiber must be recruited and fatigued.
What about CNS fatigue? While it isn't the only cause of muscle failure, CNS overload isn't to be overlooked when talking about training to failure. The nervous system is the boss! It's the CNS that recruits the motor units, sets their firing rates, and ensures proper muscular coordination.
Central fatigue can contribute to muscle failure, especially the depletion of the neurotransmitters dopamine and acetylcholine. A decrease in acetylcholine levels is associated with a decrease in the efficiency of the neuromuscular transmission. In other words, when acetylcholine levels are low, it's harder for your CNS to recruit motor units.
So, if we look at the argument from this vantage point, we also have a catch-22. Stopping a set short of failure, while not worthless, might not provide maximal stimulation of the muscle fibers.
You might recruit them, but those that aren't being fatigued won't be maximally stimulated. However, if you go to failure, you'll ensure maximal stimulation from the set, but may cause CNS overload, which could hamper your long-term progress. Soooooooooooooooo
