No. It's not necessary. Like seat belts. Fire extinguishers. Condoms. Designated drivers or liability insurance.

But if circumatances are such that it causes a problem your hindsight won't rebuild a crashed plane. I follow the 12" and no metal-to-metal rule and have never lost a model to a "glitch", "hit, "brown out" or other excuse pilots use.

It's pretty cheap insurance. Usually (I fly mostly magneto) I need to get weight closer to the tail; so a remote throttle servo is an advantage.
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