Yes, we should be sending all this extra vaccine to poorer countries, because that would be the right thing to do, the moral thing. But even for self-preservation, we should be doing that. Every infected person is a mutation factory, so the fewer infected people there are in the world, the less chance there is of a mutation that’s vaccine-resistant or worse.
That’s self-preservation on a societal scale. But that same sense, at a personal level, lets me say, if they’re offering it here, I’m going to take it.