Did Randall have what it took to keep Jack in his bed, and not get into his truck and go to Ennis? That's the bottomline. And I think that's could be said no matter where you're from, who you are, how or where you live. Love is the basic, most misunderstood, understandable emotion there is. It drives us to despair, or to unbelievable happiness, it's fleeting, long lasting.
We see it in Jack and Ennis, we see us, we bang our heads against the wall wondering what's in these guys heads, we understand to a degree their fears perceived or real, we jump and yell at the screen "hey go for it you idiot".
Look, for me, I'm not college educated, nor well travelled, I'm just working from my life experience, but when I come home after work, and there is someone there who loves me and wants me that's it for me, isn't that something we all are looking for? Isn't that what Jack was trying to tell Ennis? And Ennis is what and who Jack wanted. Randall could have given Jack the world, but who's world, his?