If the OP thinks that eking out a record by a centimeter or two at a time is easy north of 20 feet, then you don’t know pole vault. You need to be erupting with competition adrenaline, sprint BALLS OUT, both arms flexed leveling a frigging jousting pole, and plant that pole in a box with enough force to rip open your armpits. There is no room for error or hesitation way up there in world record air space. It’s full physical and mental commitment.
Also, they get a bonu$ from their sponsor for every new record.
Go Mondo!