Oh yes, I agree wholeheartedly! Elves and dwarves have history, that's one way of putting it, and deep cultural and social differences. A love story between an elf and a dwarf is practically impossible because the two species aren't compatible at all and this is why elf/dwarf friendships are extremely rare in the books... a romantic relationship would require a very long, very complex build up that it's just not possible to insert in a few hours of cinematic rendition.
But you know how it is in Hollywood..give the people what they want and they will make you disgustingly rich. So enter cliche love triangle between three impossibly beautiful actors and great love-at-first-sight movie romance and you're done.
Despite all of this, in the end I fell for it all the same
Thanks