I don’t have an answer right now, but this was a great question OP, and also your answer is great. It’s weird enough that I would have never thought that someone would.

Only thing that comes to mind now is a thing from Buddhism called the five remembrances. I’m not Buddhist, but I like quite a few Buddhist ideas and this is one of them. I don’t think of it as weird, but a few friends I’ve discussed this with have found it weird; they didn’t understand how this is a source of comfort to me, and they found it quite depressing to think about. I find it comforting for precisely those reasons, because I’m terrified of change, but it’s inescapable.

Anyway, roughly, they are:

1. I am sure to become old; I cannot avoid ageing.
2. I am sure to become ill; I cannot avoid illness.
3. I am sure to die; I cannot avoid death.
4. I will be separated and parted from all that is dear and beloved to me.
5. I am the owner of my actions, heir of my actions, actions are the womb (from which I have sprung), actions are my relations, actions are my protection. Whatever actions I do, good or bad, of these I shall become the heir.