Everyone gets old. Not everyone becomes black.
I think a part of becoming old is recognizing that, statistically speaking, you are going to be a bit "old fashioned" on social issues by the time you get to be 60 or 70 years old. And to be crystal clear, by "you" I mean everyone: me, you, all of us.
You know what would be incredibly toxic to social progress: if people naturally lived to be hundreds or thousands of years old. Even beyond the profound social implications, imagine the concentrations of wealth in that scenario. It would be disastrous.