Poor advice.
Thats simply to bench more weight. Did you read his original post?
Powerlifting is not about exercising, its about shifting more weight, so we shorten the range of motion. This is the opposite to creating a better athlete.
Wide stance low bar parallel squats are innefective compared to Oly squats for athleticism. Wide grip arched benching is poor compared to push press.
He's a boxer, shifting maximum weight over the shortest range is not going to help.
Single DB overhead press is my all time favourite lift, as long as its done strict.