no........is like saying "move washington DC to the center of the US, so is safer there"
is tradition, and houndreds of years, plus u cant simply make a new vatican city, the present one is almost a world wonder.
u dont really need the Pope in mexico, since he visits them every few years.....and they make sure is worthwhile ^_^, hes greated like a returneing hero of some war or something. is an event compared to a small olimpics, eceryone goes tehre to see him, even for a sec..