Stropps, just popping in to wish you courage & strength. You've already thought it through and told yourself all the sensible things I might say.
I would just add, no academic work is ever wasted, even if you're working on tosh. You're using your brian, mentally comparing the tosh with real stuff that matters, etc. Yes, you have to go along with it & jump through hoops for now but that doesn't make it a waste.
But I think "get on with what needs getting on with" could be my new anti-black-dog mantra 
On the subject of ageing, I had to get a passport photo this week. I will have to live with it for 10 years. Oh, how I wish I'd had time to put some slap on. I look like a corpse. At least I can hold out some hope that in another 10 years I won't look any worse.
Come to think of it, you're the very people I should ask for some advice. How can I learn to apply eye make-up so that it stays put? I'm terrible for smudging it/rubbing it off.
In other news, choir is fantastic and DD won the regional semi-final of her public speaking competition, so is thrilled (as are her teachers).
MI, I think Herbs has hit the nail on the head: the outrageous demands make it sound as though your Mum is getting back on form already.