I think you mean light farm tractors cannot be expected to do the work of industrial tractors with dozer blades or even with loaders attached. You can find lots of tractor failures if you watch YouTube mostly from India. One must operate within the limits of a machine. Those little home farm helper tractors are the next step above a garden tractors. They rate these types of tractors by horsepower which is deceiving. The two big things are torque and weight. Using those loaders for other purposes continually will likely have adverse consequences. Machines of all sizes have limitations.