He didn't write that he should ignore his food intake, and I also agree that many people claiming fat gain, while they may lift weights, really aren't training with that much intensity. First, intensity is relative and I have seen many guys who truly think that one 45lbs plate on each side of a HS machine is really pushing it. Much can be learned by training with others who are stronger than you and even more serious about training. The rest does come from diet.
I mean, seriously, the guy wrote that he benches 160lbs. That is not a lot of weight and, unless he has no discernable muscle mass, I am betting he can lift more than that. You give people way more credit than I do by "assuming" they already know how to lift with enough force to see results. More and more people today DON'T.