Could it also be to do with the increased lethality of SUVs? A study in Ireland shows 11.5% of pedestrians hit by an SUV were killed versus 4.5% for a car.
No law is perfect and there's always an edge case to provide a reason for doing nothing. This is definitely a step in the right direction to stop the arms race that purchasing larger vehicles has become though.
In fairness the question is open to interpretation. They don't specify if they mean western or eastern Arabic numerals.
As schools in the west already teach western, the people responding could justifiably deduce that the question is referring to eastern.