Agreed - as Blaze always says, save the why and how it works (under the hood) for later and for now just show them the goods.
And when a major instance defederates from Lemmy.ml I will start recommending that exact instance to people.
Or, an admin at sh.itjust.works mentioned the possibility of automatically applying a user level block to it for all new users, along with a bot message about how to remove that block. As discussed above, it would be far from perfect (e.g. someone mentions that the genocide going on in Ukraine is bad and gets hit by many downvotes with no clue where they came from bc they are not shown notifications from the people who may reply to say how it is actually good though, bc Russia is the one doing it...), but indeed it would be better than now.