Strong-minded, creative humans with weak bodies can now survive and reproduce to pass along a certain kind of intelligence. This no doubt includes many of us in this discussion. Without antibiotics, I would have died of pneumonia at the age of three. The survival of us as a species may well require the depth of vision and understanding which will be the result of a long-lived race. If a three year old child does something wrong, the correction or punishment must come immediately, because children of that age cannot connect cause and effect over a time period of more than a few minutes.
Most adults can recognize that their actions have consequences over longer time scales.
A person with an indefinite life span is going to develop an even greater ability to make good survival decisions. I worry very little about the interest of future people in reviving us. I worry a LOT about our ability to survive the next 20 years until we can grow enough to make cryonics more likely to survive as a long-term aspect of society.