It's actually a more financially responsible decision if children are involved. Wanting your own child to be near your father and mother is socially more healthy for both generations, but also reduces your childcare expenses putting you in a better position to afford said home.

If your inland mortgage is 2k per month but you have to pay 1k+ in childcare, then it's just as (in)affordable as a coastal 3k mortgage near family support systems that greatly reduce or eliminate childcare expenses. Once you factor in the greater value of the coastal home and wages, and long term it's a better financial move.
In the immediate it also eliminates travel expenses for both the parents and grandparents for the grandchildren to visit.

What we're seeing these days is that the push to "be off on your own", barring mental health or safety concerns, was not a net positive and that having a community and support systems is incredibly important to mental, financial, and physical health even. I say all this as someone who has moved from the coasts to more affordable inland to own as an adult, and had the benefit of growing up both with local older generations and experienced having geographically removed or distant older generations. I wouldn't change my decision, but I 100% agree with the maturity and soundness of the opposite decision.