I think in theory vehicle tire pressure specs makes the assumption that the tires used will exceed those specs. For example your vehicle might say 32 psi, but the tires that came on the new vehicle might say 45 psi. If you run 45 psi it's gonna be loose and dangerous.

1953 Chevrolet 3600
Fried Green T'mater (Vern)
In the Stovebolt Gallery
Caution: Political Statement
Man who runs in front of car gets tired, man who runs behind car gets exhausted.