45,000 years ago, a Neanderthal man experienced a crushing blow to the head that left him partially paralyzed for life, but his bones healed and he lived into his 30s or 40s, something only conceivably possible with the help of his community.

45,000 years ago.

But let’s pretend that 45,000 years later, we “can’t afford” universal healthcare.

https://humanorigins.si.edu/evidence/human-fossils/fossils/shanidar-1

Shanidar 1

The Smithsonian Institution's Human Origins Program

It’s important to understand that people—not even Homo sapiens!—living at what must have been the subsistence margin, without states or written language or metal tools or electricity or antibiotics, managed to keep this person alive. They devoted resources to his care and survival. He lived for years, possibly decades, with a severe disability at a time when his community would have been doing things like fighting off literal cave bears.

Our society has inconceivably more material, social, and technological resources to bring to bear to help each other. We have no excuse.

I’m trying to think of a comparable analogy. Imagine if our descendants from 45,000 years in the future time traveled back to us and, while showing off all the incredible marvels from such an unimaginably distant future, told us they don’t wipe their asses. Just walking around covered in their own filth all day. “We can’t afford it,” they tell us.
@HeavenlyPossum That's a great analogy, I'm gonna use that any time someone argues with me about healthcare now.