Can I rephrase rotorwash's logic:
If the manufacturer has designed rotor parts that are too weak, he can cover that up by designing servos that are also too weak. That way no rotor parts break, and he can then blame the pilot if an accident happens.
The best answer? Just don't buy a substandard helicopter - that is, one with parts or servos that are too weak. There are several reputable manufacturers who seem to have no trouble finding both strong parts and strong servos.