They are still low effort. Just slap down a farm tile and put a wort there. Dupes will supply it with phosphorite automatically. Very quick and easy IMO. They are not really meant to be a permanent endgame solution. Just a stepping stone until you unlock better tech...
This. Fish is just totally OP compared to other options. Pacu farm doesnt consume any resources or dupe labor and you get level 2 food straight out of it. And it can be cooked to level 3 food. Other level 3 foods require 2 ingredients.