It is true that some residents have children who don't visit. Maybe they live far away. And of course, you don't know what that person was like as a parent either. May have been a high-maintenance abusive PIA to the kids growing up.
As for waiting on the inheritance, after a few years in a nursing home at 70 to 80K per year there isn't likely to be much inheritance to speak of. What the greedy children actually do is get named guardian for their parents so they can legally abscond with the assets even before they die.
Re: “What the greedy children actually do is get named guardian for their parents so they can legally abscond with the assets even before they die.”
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I know a greedy stepdaughter who is doing precisely that with my aunt at this exact time.