My MIL loves independently…and her six kids are all over the globe. None lived near the inlaws. They chose to live over 4 hours away from their nearest kiddo when they retired.
Fast forward a number of years. As their health became more uncertain, and they needed more help (they were living in a semirural area), their kids had a conference call, and decided to suggest they relocate nearer to someone. There was only one sibling who lived in a similar town and climate and area. The kids researched CCRC and found a fabulous one near that sibling who is about 10 minutes away. And the inlaws moved.
So in the case of our family, it wasn’t the adult kids making the decision to live near or not live near the inlaws, it was the inlaws. I should add…none of their kids had any interest in living where they chose to live when they retired.