How do we know that the changes to the ascent profiles that divers are doing to optimize their approach are actually making it better? How do you know they are not making it worse?Because there's a difference between simplest and the most optimum approach.
The majority of divers benefit from having the simplest safe approach.
A minority of divers seek an optimum approach, possessing a capability and understanding to apply approaches that are more complex.
Scientists like Buhlmann, Spencer, Powell, and the whole Navy Experimental Diving Unit spent enormous amounts of time and money creating what they think works best--what are the odds that some guy will dream up a tweak that will make it better? It might be better. It might be worse. How will they know?
Let's say some one tells you that before they go out for a drive in the car, they always take a stiff shot of whiskey to calm their nerves and make them a better driver. You try it and have a good drive, so you decide that you, too, will have a big best of whiskey before you drive. You do OK--no accidents. Does that make drinking before driving the optimum approach?