Well for one it could go to desperate people in 3rd world countries? If you already provably had covid letting your now useless shot go to the ones in need is arguably the moral choice?
The doses in the countries they're at now aren't likely to go to a different country, and are more likely to expire before they could be shipped elsewhere, so people in those countries may as well get them. For other places, the problem is manufacturing and distribution, and lifting patent restrictions would help too.
>How it would have hurt to get a vaccine?
Notice how easy it is to conveniently jettison the science + data and just demand that people "tow the line or else.."