It is more of a safety thing, because the battery is so close to the fuel lines and fuels rails, which are easy to damage during a collision. I sure don't want an arcing battery near any broken fuel injectors, rails or fuel line.
In fact I've been thinking about replacing the flexible rubber fuel line over the driver side exhaust manifold, with a SS braided piece from Earls. I can't believe they allowed such a stupid design. Keep an eye on it for cracking and leaks, that thing is dangerous.