How does that help them?
If I am told a 4BBB card can be used for handicap purposes, and I am already on the card nine times, then if I can score two points on a hole where my partner is already in the hole for three, or is very likely to be, then I am going to hole out for those two points and make sure it is recorded on the card and entered onto my EG record.
That gives a more accurate HI adjustment than applying 1.5 points to a hole where I can score more.