bad advice

this works for you because you are a certain weight and ride in a certain way

i promise you that if many riders took your advice they would have problems

for instance
i am 260 lbs
and i have a bike with 700 x 23 tires with a max pressure listed as 100 psi

at 90 psi those tires allow the rim to hit the ground
every time i ride over something larger than a cigarette butt