Exactly. What sane grandparent would want to live at the cost of cannibalizing their grandchildren? What the sandwich generation received as kids, they need to pay that forward, not back.

For one, I don't want a long life. I want to live as long as I'm not a burden. Don't want to burn down in my final years all that I will have built up for my kids and their kids.

Now, they say that anime is not real life in Japan, and it's true; however it absolutely reflects (I dare say: indoctrinates viewers with) cultural elements of Japan. And this "fuck up your kids' lives so you can take care of your parents" is so characteristic. A good example (of this terrible phenomenon) is in Lovely Complex, where Nobu-chan effectively needs to abandon her sweetheart Nakao-kun, just so she can care for her grandmother, who's about to move to Hokkaido. The most heart-wrenching part is where Nakao and Nobu's grandma sit at the dining table, and Nakao is guilt-tripped into actively encouraging Nobu's grandma to travel to Hokkaido and to rob him of his beloved Nobu. Fuck all that, seriously.