[ifyoubuildit]

In a general sense, can you call something a "settled scientific matter" if so many people are in disagreement about it (ignoring your or my own personal beliefs)? The idea that anything is "settled" with regards to something as young as covid seems a little bold to me.

That aside, there is plenty of social value to trashing people that are in the out group. If you meant is there utility for the whole population, sure, if you can guarantee that you are correct in your position and that shaming will have the desired effect. That seems unlikely in general, but especially in the case of a bunch of redditors shitting on dead people.