Just guessing I'd think it has to do with the idea that "after all it's ground" so must be safe safe to touch and might even makes sense to do so (like discharg

Just guessing I'd think it has to do with the idea that "after all it's ground" so must be safe safe to touch and might even makes sense to do so (like discharging yuorself before touching small electronics in case you're not wired to ground with a strap).