During the devastating events in Margin Call there is a conversation between Will and Eric Dale whom Will has come to convince into returning to the company after having previously been fired. Eric explains that he has once been an engineer and constructed a bridge, which he concludes, after a long chain of numbery explanations, has saved the people crossing it "1,531 years of their lives not wasted in a fucking car". This is surely meant as a statement that he once did something meaningful in his life and doesn't see much inclination to return to that supposedly less meaningful job from which he has been fired anyway.
But after that when it is clear that he won't return and Will is leaving for good, he responds with
Will: Well, you're a better man than me.
Eric: That's always been true.
Will: Yes, it has...House looks good. Don't beat yourself up too much about this stuff, right. Some people like driving the long way home. Who the fuck knows, right?
Now it might seem a rather marginal question, but I didn't really get what he wanted to say with this last part directly referencing Eric's bridge analogy. Seeing the importance of that bridge speech, there seems to be more to Will's response than just a throwaway line, but I can't really wrap my head around what exact statement it is he wanted to make with this response. Add to this that Eric indeed returned to the company (after they clarified the consequences regarding his gratuity and health insurance if he wouldn't, though).