I think we need to care about our parent too. As they become old, we are just fly away from them and they will struggle in their stage as us. Damn life.
I think those who like their parents do already. I think those who don't like their parents don't need to. It's the parents' job to be a person worth loving and caring for. It isn't the child's burden.
I have a mother who makes so much effort to make sure she stays in our lives. Calling/Facetiming every week at minimum. And she has visited at least once or twice a year the past five years. And we visit at least once a year if possible.
By contrast, I have a father who has literally done nothing to try to visit us in five years. It was always us making the effort, taking time and money away from ourselves, for them. And we got very little in return. We have been given very little respect by them despite showering them with undeserved respect. Every time we visit, it's like they're acting out their own Seinfeld episode -- literally worth nothing except waiting for the next opportune moment to be sarcastic "gotcha" asshats.
Some people would say, one shouldn't look for a return, that it should be all about giving. Those people must never have been burned in their lives. For me, reciprocation is the bedrock of a relationship. Any relationship. It doesn't have to always be equitable, but time and effort must be shown. Otherwise, I'm out.