uu-anker
You have to read it in context as to where you are flying to.
Flying to JNB we would carry Durban or even Cape Town fuel as alternates. Flying to Bombay we may well have Chennai or Delhi but to JFK we may just carry EWR. In those former instances the planned landing fuel would be even more than the 40,000lbs referred to earlier.
Horses for courses, but then again coming from Dubai I don't suppose fuel cost is really a consideration
It amuses me when an alternate is chosen depending on weather. What if an a/c lands, burst the tires and the runway is closed.
What do you suggest then. Presumably you always carry fuel for two alternates or an airport with two independent runways. What happens if they both have problems? Do you carry fuel for a third alternate. At the end of the day it comes down to risk management, and you cannot get rid of the last incy-wincy bit of risk unless you stay on the ground. Maybe you should