unfortunately I don't have enough time (atleast not these days) to read what is going with that post so I don't know the whole story.
Regarding HNQ removal, I was aware that some are removed.. [Here](https://math.meta.stackexchange.com/a/30757/515527) Asaf Karagila explained some targets, however by searching through your given query some removals seemed indeed weird. Their initiative might be good, but there should be a measure on how many to remove, sometimes it will get subjective.