I'm sure if we could interview the two fish in there, they would tell you they have lived a pretty happy, peaceful life.
Much less stress in an environment where they can't constantly see humans walking by or light's shining into the tank at random times, no hands in there, no big changes or fluctuations in water chemistry.
Fish would also be just as happy with the rich, natural diet of pods and algae than they would be with something you are putting in there.
Again, the idea is that things didn't just get by, they did well....as well as in tanks that I would spend an hour a day or more on.
The fish are fat and healthy, the corals have all grown, both zoas and LPS and the RBTA has split several times.
No animal abuse here.
My two dogs and two cats agree.