What most pilots don't know, or want to know and some mechanics don't know either is that aircraft tires are made to leak inflation gas. A series of small pin holes are punched into them above the bead at manufacture covered by green dots in the cast of tubeless tires and white dots in the cast of tube type tires. This allows the inflation gas that seeps through the natural rubber liner (natural rubber leaks)
to wick out through the tire casing and not cause separation in the casing. Some tires leak 1% some leak 5%. If you don't service them daily or prior to first flight and it been 2-3 weeks you got a potenial problem.
Throw in the fact that you have basically the same size tire on a Lear 23 @ 12,500 pounds and a Lear 60 at twice that weight even at double the higher pressure you got a big problem. Also, even if you gave a pilot a pressure gauge, he/she isn't going to crawl inder there and get their white shirt dirty, and even if they did, where are they going to find nitrogen at that time a night, how much and what about the delay imposed on the rock star or air head hollywood type. Pleanty of info out the Goodyear, Michelin, Dunlop websites.