Sorry, but that makes absolutely no sense at all. Dudes that are in shape look great at the beach and in tailored clothing...as long as it's tailored to fit properly.
Don't you remember Victor?
That's total hogwash mate.
You tailor to fit the body, not the other way around. Sure, certain OTR fits might be harder, but plenty of brands don't cut their clothes for waifs as well. lol.
Personally, I've gained probably 25 lbs since I started posting here. I've gone up a few jacket sizes (from just under a 38 to close to a 42 for some brands), and I honestly think that everything looks better because I actually fill out some of the jackets, the shoulders work better, etc.
TLDR: It's about the cut. You fit the clothes to the body, not the other way around.
I wonder what happened to the guy. I continued to follow his blog after he quit SF but eventually, even his blog closed shop.