You should see a doctor about that.
a lot of people genuinely don’t have the memory capabilities to remember the birthdays of various people
Because they don't try.
30 years ago, it wasn't weird to have 30, 40, even 50 phone numbers memorized. Ask anyone who was alive then. Now people just push the icon for the person they want, allowing their brains to get lazy.
Your brain: Use it or lose it.
Must be nice.
In any case the point of my original post was much more about technology that serves only the user - not any specific use case.
From the replies, I see I could have done a better job of making that clear.