If people don't have an interest in a thing, don't expect them to see the good side of that thing. Bitcoin is interesting because you study it and has understood how it work, the people that has refused to learn about it are the people who don't care about it or have interest in it.
There is no way a person with some money invested on Bitcoin is going to say he is having difficulty in understanding Bitcoin, before you invest in anything you must first understand what's about and how it work, so it's not a mystery that people don't understand Bitcoin.
Yes I agree with OP, if you don't have interest for Bitcoin it will be difficult for you to understand it, especially when your not the one investing in it,
When you have not invested in bitcoin, you will fail to realize how interesting bitcoin can be. I may be guilty of this too. I think a lot of us had a time where we knew of bitcoin but we never did anything to show our appreciation towards it because we never got to experience how good bitcoin can be to us. But if we try to give bitcoin a chance, we will realize how beneficial bitcoin can be to us and then that is only when we would show more interest to bitcoin.