Anyone who claims that those of us without children don't care about the future is telling us something important about themself.
They are telling us that they did not care about other people's children.
And they quite possibly still don't care about them, not directly. Their care for their own may well be deep and durable, while their care for others' remains fundamentally contingent. They can think a future is good full stop if it's good for their children. TBH I find that deeply disturbing.