If there was no point system there would be no minimums. No one cares if an antique Triumph sets a record at 34 miles an hour on an open record.
In the points system, he would pick up bonus points for the record. Then he would reset the record at 36, 38, 40, etc. Picking up bonus points every run. That's why you need competitive records.
That same experienced Triumph rider hardly needs a rookie run. Just behind him in line is the guy that drives an old Volkswagen on the street, just inherited a bunch of money, and bought a AA lakester. That's the guy the rookie rules are written for.
Every rookie run is watched under a magnifying glass because it only takes one over ambitious guy to ruin it for everyone. Leave the rookie runs alone they work fine.