That article is crap. Just another writer trying to make a better mouse trap, writing to fill space.
Powerlifters don't do ATG squats, unless they make a huge mistake. Olympic lifters do, as the bar is always in front of the body. With powahliftahz the bar is behind the body, on the back.
Try it in the gym next time. Do a front squat then a back squat. The front squat will always be much deeper, unless you are ghay with zero mobility.
This just plays into the bro lifters who think half squats are the bomb.
To back up my rating for this article, just have a scroll back through previous articles where the exact opposite is promoted, mostly by people who have a clue, not like "Joel Seedman, PhD".
Not sure why he has a basic powerlifter depth squat at the head of the article. I guess cos no one ever does true ATG back squats. Mind you, some feds would call that an ATG squat cos they never hit parallel. Helllllllooooo Dave Hoff.