StillDark&Hungry
Think about it. The bus and every other plane burns fuel at a rate you dont seem to understand. One ton can make the difference between landing at destination or having to divert. Not sticking to the rules in this business could mean landing short of the runway. Maybe its just in the undershoot area and everybody is ok or it could be further short and nobody is ok.
Rules is rules, if you want your career to last that is!!