There is a good chance you simply have not acquired the taste for it...
For example, I have to make myself eat fish (especially salmon). Most people upon hearing this, totally FTFO (Freak the F Out) "OMG Y U NO EAT TEH SALMON?!", which I find particularly odd.
I grew up in a very landlocked area with little-to-no seafood, only occasional freshwater fish (trout, bass, and catfish - which I love), and crawdads (crayfish).
With liver, for the longest time I was taking liver in pill form or adding the powdered liver to my protein shakes - but after having a liver dish at a German restaurant (Leber Berliner Art) that featured apples fried with the onions on top, I found a way that I could enjoy liver. When making this dish at home, I added bacon (of course) to the onion/apple medley and I love it. I will also say that my dad fed my sister and I fried chicken liver and braunsweiger/liverwurst throughout our childhood as well... and while it was a novelty food item, we still enjoyed it.
But, perhaps it's just not something you can wrap your own brain around. No serious loss. Just like me only eating Salmon less than once a month.