Exactly this. ^
I have had the good fortune to NOT have to deal with parents who had a very prolonged, drawn out decline, and became immobile, incontinent, dependent on people to feed them, and to do everything for them, and had a total cognitive decline. I haven't had to be that middle aged daughter who all the care fell to for many years, because as I said earlier, my parents went fairly quickly, as did theirs. All mid 70s to early 80s, so they lived a decent amount of years, and were all mobile, independent, and hadn't declined congnitively.
It was strokes, heart attacks, and cancer that took them all, (my parents and grandparents,) but they all died quite soon after becoming ill. (All less than 7 months.) I did have to do some care for my mum and dad, but for around 5-6 months, as they went downhill quickly and had quite a quick death. None of them went into care either. It was hard going at the time, as I had small children, but I only had to do it for a short while. (Less than half a year.) I can't imagine having to do it for many years like some do.
So whilst I didn't have to do it for long, I have seen sooooooooooo many friends, acquaintances, neighbours, and colleagues, etc who have been through much of the stressful shit that has been posted on here with elderly parents who they have to look after, and do everything for, (life admin, shopping, housework, washing, cooking, all sorts, including personal care sometimes,) as well as having to do everything in their own life, as well as holding down a job, and sometimes having children at home. And it goes on for YEARS. (And they are almost all exlusively WOMEN.)
No man will ever do any care if there's a woman available. I have even seen some men push the care of their mother (the woman's mother-in-law) onto their wife! The men seem to be very busy when care work is needed, or not well, or something, anything!
The women are run completely ragged, they look 10 years older than their years, they have zero social life, and no time to themselves for any hobbies or winding down and relaxing... And many of them are no Spring chickens themselves (often in their 50s and 60s.)
That comment from that poster came from a place of complete ignorance and privilege.
Like others have said, if I see myself going like this, or develop something that means I will have a long, drawn out decline, I am off to Switzerland. I am not putting my children through what some middle aged children have to go through with their parents.