When/how/why max tire pressures raised from 35 PSI to 44 PSI?

Funny Lori n I argue about how much psi to put in her tires. I say go with rating on tire. Lori says go with rating on door jamb sticker.She went and had new Toyos put on for winter so we revisited this "discussion". She asked at ths tire shop...he said to go with door jamb sticker psi!?!?!?
How in the hell does the car know what tires its wearing? Lol