Agreed in principle
Indeed and agreed. However, at the end of the day, life is an exercise in risk assessment and management - flying aeroplanes is, I suggest, no different.
The initial risk is not getting to the runway.
The subsequent risk is not stopping on the runway.
The older standards envisaged a maximum 20kt approach speed exceedance and, on the basis of simple mechanics this accounts for something in the order of 35-40 percent worry on the distance. Given that 1.43 worked reasonably fine for alternates and we normally have 1.67 or higher for wet conditions, carrying a modest margin appears to be a reasonable balance to me.