Just funny that you are saying that you can’t relate to someone because they can’t relate to someone. Empathy isn’t just about feeling other people’s pain, it’s about being able to understand things from another perspective.
Not being able to relate to them is literally relating to them.
It only ‘matters’ to the extent that OP claimed it doesn’t run in families, and you seemed to be claiming it does ‘because’ you had 3 -5 relatives that died from it. All I’m saying it’s that anecdotal evidence doesn’t refute an assertion like that.
If you’d said ‘it does run in families and here is a statistically significant sampling across variable x, y and z’ i wouldn’t be arguing, I’d likely be reading an article about it. But it’s worth pointing out when people use unscientific reasoning in a forum where other people might be influenced by an argument if no one calls out the fault in logic.