Dis movie about Weyland, plain and simple. The one jockey is a soldier-type, the ships are bombers, and Shaw and David are the only ones left alive. David can fly the ship... I mean, it's almost not that bad out of sheer necessity for the characters.
They have 2 options, take the ship back to earth and deal with the shitstorm and possible spread of the DNA and annihilation of their species, or say f**k-it-all and head to the Jockey world. Maybe they want to turn the tables, despite how cringe-worthy that prospect is.
It could definitely be better, but... I don't know, don't mind it. I actually think it's kind of cool, especially if we're attached to the characters properly by credits.