> there is quite literally no good evidence that boosters for Covid do anything for otherwise healthy people who have already been infected

Before I dive back into the literature, as you claim to be stating this in good faith... is the "good" load-bearing here? Relentlessly attacking methodology is an easy way to make this kind of general claim.

Also, are you talking narrowly about a group of people that has had COVID but never had a prior COVID vaccination? (In which case is it still a "booster"?) Or is a proper steelman of your position that anyone that has had COVID, regardless of prior vaccinations exposure, does not benefit from additional vaccination in any meaningful sense?