Society is bizarre in innumerable ways. The number of people who I know that have contempt for children or people having children is repugnant to me. I think the disdain for the young and old is a sign of decadence.
There is nothing you can ever do to destroy the planet. Check your hubris. Most of what you like about the planet is its suitability for human life, which is to say, it isn't the planet you like, but your descendants.
If the people who care about the environment don't have children, then future generations will just be comprised more of people who don't care about the environment.
I'd ask what mental gymnastics are involved for a rich country to ignore tens of thousands of elderly to die alone and abandoned until their bank accounts drain?
My grandparents all died when I was young, mainly from alcohol and cigarettes. I never knew my father. My mom is a terrible person. Each elderly person has a story, and it would be wise to review how they got to a scenario that involves them dying alone. I am sure there are some sad tales, but there are probably some less than sad tales involving the life of an asshole.
I would agree that there should be better social safety nets in place for the elderly, not because their family members failed them, but exactly the opposite. It should be intended to free up family members from the burden of being someone's retirement plan. I have heard people say a good reason for having kids is so you have someone to take care of you when you're old. That sounds like a great way to set yourself up to die alone.