If you look at the table on Awesome Lemmy Instances, Beehaw is far and away the most block-happy instance around, blocking over 70% of all instances in the Fediverse. They seem to see it as the defacto way to manage their instance.

Makes sense since, as other users have pointed out, the whole instance seems to be run by only a handful of the same Admins/Mods, so they are likely stretched very thin and are just taking the biggest swings they can to manage everything. They either need a major overhaul to their approach or that instance is going to fade into nothing.