Um... gun runners don't have access to battleships etc, but their home nations may have. However, when they're smuggling, they don't use battleship escorts. And they steer clear of Area-51, funnily enough.
Smuggling should be about stealth, not about forcing the product through.
In RP, if you escorted artifacts to Manhattan with a small fleet, the produce would be easily intercepted planet-side. You don't want the locals to know oyu're even there.
Liberty players should be busy fighting Rogues, Xenos and Hackers, not spending all their time in Alaska fighting Corsairs.