Well, wait until your parent has dementia and turns into a giant toddler. That person who loved you, taught you and forced you to do all sorts of things you didn't want to do as part of the learning process - it is very painful to watch them unravel. And the unravelling can take ten years. You...
A ten-year-old or forty-year-old dying of cancer might appreciate an improvement in their quality of life, as might a person with dementia, who is physically well, but mentally deteriorating.
Indeed, and don't concrete over seafronts to create lovely promenades, marinas and off-shore islands, as all that displaced water will also have to find somewhere to go. Up a river near you.