Not necessarily, it depends on the electrical insulation and the internal protections. So we can’t really say whether it would be a weakness for them or not. Contrary to what you’re saying, that isn’t true for all electronic devices, even in our world, notably commercial airliners.
Because of that, I find it hard to imagine that a company as wealthy as JCJenson wouldn’t properly insulate their drones. It’s possible, sure, but there’s no proof that it’s the case.
So it’s not really a solid argument, since there isn’t enough information.