Nice article. As always, it's all about opinions and he openly admits this is what works for him. Case in point -
"I personally have never failed to redpoint a route because my lats weren’t strong enough to pull me up to the next jug. Unless you’re an elite ice climber, I doubt you have either."
My main weakness is not my fingers, it's my lats, my general all round strength. I'm certainly not an elite climber but I can list climb after climb where my basic strength has let me down. Flying Buttress Direct, Kirkus Direct and a whole host of HVSish roof stuff. I'm lucky if I can make three pullups, at the moment I struggle to do one but I can manage that max in the BM mono slots.
In general, I'd agree with most of that however because when I do train with structure, it's pretty obvious that I climb a lot better.