can a referee make all the calls

[fmkjrunc]

a referee said the other day, i cannot make every call, we would be here all day, im a caretaker of 22 acres, my boss said time to cut the grass, i cut all the grass, not just certain areas, is their a difference in the way any job should be done, do it all the way or not at all, i think the referee that chooses what to call is showing favortism to a team and not doing his job, do you think if he starts off by making calls, it will police the game, comments please