That’s still their decision, though. There’s no law of nature that says they have to distribute things this way. At the individual level, I’m not going to be able to force them to change how they distribute vaccines.
This is unlike getting the vaccine in the first place. There is effectively a law of nature that says that not getting vaccinated will harm others. Getting that vaccine does actually directly help reduce the spread.
The decision of where to send the vaccine needs to be made at a policy level. Assuming boosters help, there is a balancing act here, with many factors. It’s not something an individual can easily decide. All we know is that we want to keep ourselves from getting this, and prevent ourselves from spreading it in our communities.