literally stone age hunter-gatherer societies took care of disabled, wounded, and sick members. we have evidence of successful brain surgeries (no, drilling holes in the skull was not just 'stupid caveman shit', it is a treatment for brain pressure/swelling), whose patients survived several decades, we have bodies missing limbs from early childhood surviving into elderly years, and basically anyone that ever got eaten by a tiger ends up buried with a tiger skull (because the group they belonged to hunted it down after it became a known threat).
like there's some valid worry over drug-resistant bacteria and viruses, but i'd rather maybe live to 90 with drug resistant threats to deal with than live to 30 knowing that the bacteria that killed me could have been easily treated lmfao.