The notion that we're meant to take care of our parents in old age is cross-cultural. It conceptually makes sense to take on the mantle of care for your parents after they've cared for you your entire life, but individual relationships are far more nuanced than that.
Basically, the conversation around taking care of parents is complicated and multi-faceted, and the chips will fall differently for each family. That said, some people enter parenthood with the full expectation their grown children will care for them in the future, and it can cause rifts.
In a popular post on the Am I The A*shole subreddit, the OP asked if they were wrong for telling their parents they shouldn't raise children as a retirement plan.
AITA for telling my mom "parents shouldn’t raise children as their future retirement plan?"
I had a rough conversation with my mom. My mom told me that children should take up all the responsibility of their parents when they start earning money (including all expenses) even if the parents are already well off. And if they don't do that, they are ungrateful because parents spend money raising them.