At first I was like, "OMG, who the f*ck is this guy and what the f*ck is he talking about?!??!?!?!?!!11!!one!"
But the more I think about it, it makes sense.
It is entirely dependant on who your client is and what their goals are.
I'm seriously contemplating the neccessity of back squats for athletes as far as muscular development is concerned. I think they could afford to focus more on front squats and RFE squats. They should be doing them already, but really emphasize them. The only reason I would/will still have athletes do back squats is for the mental toughness aspect and for when they have to test out when reporting to camp.
If I were training a powerlifter, why would I NOT have them back squat? Not having them back squat is like wiping before you poop.
Olympic weightlifter? They rarely do back squats anyways.
Your everyday gym rat? Shit. They don't squat anyways.
A paying weightloss client? Nope. I really don't think I'd have them back squat anymore. What Boyle says makes sense, and I don't think a weightloss client really needs them.
There is nothing "smart" about a 3rd attempt deadlift.