Region3
Ryder Cup Winner
On an average par 4 I would expect the scratch pair to average about 3.4 and the 18 hcprs around 4.5 based on one double bogey, 4 bogies, 4 pars and a birdie.
The low hc's should think themselves lucky then. 4BBB should be played off 110% allowance.
Although I think you overestimate the low guys abilities. That rate would give them a better ball score of around 47 points. I'd say it was pretty unlikely they both shoot 72 and have a better ball score of 61.