This is a really interesting question. Very much like the list. It reminds me of a venn diagram of the Bitcoin blockchain (don't understand why they call it the blockchain spectrum):

If you're living in the west, it could be that your financial privilege (@gladstein) is holding you back from understanding Bitcoin.

Not understanding energy is currently very relevant, because of all the Save The Planet, But Not The Humans Bullshit.

Not understanding technology is a big one.

Not take the time to understand Bitcoin is also a very big one. Over the years I've noticed people's knowledge about Bitcoin is what mainstream media writes about Bitcoin. But to be fair, it's indeed a very difficult topic to grasp that needs the right educational resources.

Another reason why people won't understand Bitcoin is I think that a lot of people I've talked to are always looking for the next best crypto which will be 'better' than Bitcoin. That means they'll never focus on Bitcoin and also make the mistake to see Bitcoin as crypto, which is another reason to not understand Bitcoin.