5psi Tyre Pressure Increase Rule

Using out Tyre Pressure system to check tyre pressure’s using the 5psi rule of pressure increase from cold to warm temp

[@Conlan109]

Great rule and all. Easy to follow instructions. Good video.
But why does it matter? I'm assuming even wear and tear on the tyre but a couple psi different isn't gonna do much.

[@iggie1439]

The traffic light didn't change for the hole 2 minutes.