Not exactly a fair example though is it?
Planes of that size are far more critical with weight and load balancing. In fact, flights i take where the passenger limit is less than 22 everyone is routinely weighted prior to boarding, though its more for load balancing than anything else. With commercial jets i would imaging the fuel load would be the single largest load, and jets rarely fly with all their fuel tanks at capacity.
Find an example of a modern commercial jet that takes 70+ passengers and you would have a fairer example
It's pretty fair if you're flying on one of those planes...
Every aircraft is vulnerable to overloading or uneven loading.