"Umm... As you get older, you'll simultaneously need more pills and lose your ability to easily open blister packs."

That isn't really a feature of old age. Some folks have some issues, sure, and sure - it is more likely when you are older, but by no means is it a given nor is it necessarily tied to old age. There are simple solutions for that, like ordering easy-to-open packaging from the pharmacist (here, they would literally put it in plastic bags). Some pharmacies already help folks organize medicines and I don't see where this would be a real issue.

I'll also state that most folks shouldn't need to buy a robot to take simple medicines plus it is going to add an expense that a lot of folks couldn't afford. It doesn't seem to be a huge issue in countries with blister packs that are fairly standard - again, pharmacies are generally helpful.