>giving a dose to a vulnerable person in a few days is pretty clearly more beneficial than giving it to a low risk person today That's not entirely clear to me

>giving a dose to a vulnerable person in a few days is pretty clearly more beneficial than giving it to a low risk person today That's not entirely clear to me, if the "low risk" person is in a position to be a superspreader. Vaccinating a supermarket checkout worker now, vs an elderly person (who gets delivery food and never meets anyone) in a few days, could easily save many more lives.