Sorry, I found all this saccharine sweet and gushy, far from the truth for many.
Only personal opinion but "chosen" to be a carer, "everything in life happens for a reason" and it's all leading up to the point one starts caring? If I believed in all that, then I would be an embittered woman I'm afraid.
Caring for my daughter wasn't sweetness and light, it was a hard, relentless slog 80% of the time. Of course I love her but she was aggressive and hateful towards me, nothing like the wonderful time the author had with her mother.
As for reason, I could ask why my daughter was disabled, my granddaughter in a wheelchair, my husband's heart attack, my cancer, my daughter's cancer, the death of her twin, my son..
Reason can go hang I'm afraid. Better to live life for the moment, to deal with each day as it comes whether it's good or bad, enjoy the good times and get through the bad.
I don't believe in a divine spirit and guardian angels but I believe in the power of the human spirit with all it's faults and foibles, that's what get's me through.
If I believed in reason, I would wonder what the hell I had done wrong to deserve what had happened to this family..so I don't. Better that way.
Edited to say I hope I don't come over as someone who thinks caring is always a thankless task. Of course it often isn't and there were times when I had fun with her, we had a laugh together and enjoyed an activity, like cooking or making something. It's just the "saintly" air of the author's writing, almost like caring is a vocation that grated on me.