Rub a dub's elder categories are spot-on, though I would probably adjust the percentages.
This is one of those things that should probably, by now, no longer shock me, but still does:
A very large proportion of elders have virtually their entire identity wrapped up in being "an elder". It is Who They Are, period, full stop. Literally their whole life revolves around "elder stuff".
That's why it is so devastating if they are ever "removed" as an elder. Suddenly, their identity is torn away. Who are they? They've devoted virtually their entire existence to being An Elder, and now they aren't. They have no interests, no passions, no hobbies, no nothing. They're just a shell. It would be sad if it weren't entirely of their own (stupid) making.