Imagine the discussions at 140kts at 300 feet at the minima - count the lights - I reakon it's 700 metres - ohh nah I reakon 900 - nah I reakon - ohh well doesn't matter now we've landed.
If anyone can with the naked eye tell the difference between 100 metres of vis at midnight at 300 feet at 140kts in pouring rain lit by landing lights their observation skills are wasted in flying an aircraft !