Huh?
Accidental starting while working on an engine could be catastrophic for both the vehicle and person working on it. If your mechanic gets hurt as a result of the change then you are going to be held liable. . . Scenario, Tech is working on something in the engine and needs accessory power, asks someone to turn on accessory only power and instead its starts because its been bypassed injuring the tech working on your stuff, you will be held liable. . . So there's that. Think big picture.
Also you lose accessory power if you don't care, that's fine. . . .