correct me if i'm wrong but in ALL operator training classes i've ever been in they instruct the operator to carry their load as close to the ground as possible to maintain stability of the truck.
AND... if the load being carried restricts the operators view in the forward direction, then it is required to carry the said load traveling in reverse. AND EVEN utilizing a spotter if need be.

With these big trucks and large loads it would seem to me that these rules would be even more stringent in following them due to the very nature of the situation.

There is no justification EVER to try and justify breaking a safety rule just because of operator 'inconvenience' because he can't see around the load.

The higher you carry a load the more unstable the truck becomes period... no exceptions.
common sense?

just my.02 worth here :)