I think that a lot of what gets misconstrued in the debate over heavy vs lite arrows is that people assume that when people shoot heavy arrows, they are advocating taking any shot they get. I don't think this is the case. I shoot a heavy (I would argue normal weight arrow for draw weight of bow up until the last few decades) arrow so that when things go wrong, I have the best chance of getting enough penetration through the parts of the animal that are in the way of the vitals I intended to hit, that I recover the animal. It is an insurance policy for when things go sideways. It is not 100%, like most things in life.
I have a different perspective. I don't see heavy arrows as a fad. Quite the opposite. If you look back to pre-compound days and also to trad archery of today, most advocate between 9 to 12 grains of arrow weight per pound of draw weight. So a 60 pound bow would be well matched with a 540 to 720 grain arrow with that formula. I see "heavy" arrows as a return to normalcy after a couple of decades of chasing bow speed. With the efficiency of modern bows why not use that advantage to move a little more mass toward, and hopefully through the target?