While the Vulcan is not going to put Starfarers out of business, why would somebody want to own and operate a Vulcan as opposed to a Starfarer?
TL;DROwners would choose the Vulcan for flexibility: it covers refueling, rearming and repair in varying ratios, or even plain cargo hauling, rather than the single specialization a Starfarer offers.
Flexibility, really, and variety. If you're a Starfarer owner, someone who's interested in running it, you clearly have a heavy passion for refueling and helping that out. But if you get a mission for something else and it's not really involving fueling, then, well, no.
That's the other thing as well, you've got to hedge your bets then that there's going to be a lot of people that need to refuel. Whereas rearming is very common and someone's going to take damage. I've played the game for more than two minutes. People shoot each other a lot. So they're going to need new ammo and they're going to need a patch job. So that kind of thing of, I can top you up on fuel, I can top you up on ammo, I can patch that hole in the hull. People aren't necessarily going to just want that one thing, the specialization that the Starfarer provides. The Vulcan has got everything covered.
Every time you play, you could be doing a different ratio of these three things. You can always ignore all those if you want and just use it as a 12-SCU cargo ship, which is not the best in the world, but it allows you to do that. So you've got, I don't want to say free rein, you've got the flexibility to...