Some of what's covered in the article makes sense. Studies are difficult to refute, particularly if your not a scientist who specializes in the study of exercise and weight loss.
My own experiences tend to support what the article says. When I'm in full exercise mode, I tend to gain weight. This is because exercising makes me feel hungrier then when I don't exercise. In fact, I often have force myself to eat during extended periods of inactivity. Another factor is that I originally started lifting weights some 58 years ago in order to gain weight and I was successful, probably because my doctor simultaneously prescribed D-bol and testosterone because I was so grossly underweight.
As I have come to realize over my lifetime, I have an unusually fast metabolism. I recently confirmed this once again when I decided to stop drinking alcohol. Being as how I was a fairly heavy drinker, I expected to experience detox symptoms, which never happened, so I investigated why this might be. Turns out, people who metabolize alcohol faster, tend to not have hangovers or experience much detox when quitting. The negative result is that I was an alcoholic with little or no symptoms. Rarely did I ever experience drunkenness. Therefore, the usual triggers to let you know when you've had enough don't kick in. I was buying a fifth of scotch pretty much every other day even though I never drank before 5:00 p.m. (a self made rule).
Alcohol is full of empty calories in the form of sugar. Since stopping drinking a little over a week ago, I've lost about a pound a day even though I've forced myself to eat more. In addition, I lowered my carbohydrate and upped protein intake.
The bottom line is that not all people fit into generalized studies. There are always exceptions.