Granted a lot of people adjust suspension setting away from what is recommended.
It may be recommended setting, but the fact that so many people use it as starting point and then adjust away from it to find THEIR PERSONAL CORRECT setting is the key point.
Even with road tyres, where the variable range is arguably reduced compared to off-road, my ‘correct’ tyre pressure my be between 90 and 120 psi, depending on conditions.
What did the designer use when testing and perfecting the design.
Ultimately, I suspect they used a lot of pro riders and averaged out all of their opinions – design is compromise process within the original brief.