That's the absolute truth. And given the vast array of high frequency oscillators, high end dacs and software configurable pin reassignment, you really need to include a pretty effective rf shield (say ~-40db over ~10kkhz-1.xghz) or go for something closer to an air moat than an air gap.

By the same token the only 100% trustworthy human is a dead one. But we trust folks constantly and we're overwhelmingly better off for it.