I would argue that "You can do the same" means the author is in sales, or at least practicing sales techniques. Now, the author might be doing this for the usual reasons, to sell their program, or the author might be doing this because some people feel that sales techniques are 'inspirational' - a lot of people like to be told on no uncertain terms that they will succeed.
I mean, i'm not personally one of those people who likes 'inspirational' sales programs. Personally, when it comes time for me to do something really difficult, I find it works best if I acknowledge it as really difficult as I'm doing it. I mean, I'm trying to lose weight right now, and it is a very difficult thing - not just for people with serious psychological issues, but for almost everyone.[1] Yes, yes, just eat less and work out more. It is simple but just because something is simple does not make it easy, especially when you are trying to run counter to a drive as strong as the drive to eat more calories than you burn. Really, I think that studying people who competitively hold their breath is... relevant here. Most people simply can't make themselves hold their breath as long as their body could physiologically take it. Now, eating less is... less intense than depriving yourself of oxygen, but as evidenced by the failure rates, it's still going against a very basic drive.
And for me, knowing that I will almost certainly never get a "beach body" and that I'll have to count calories and struggle for the rest of my life just to not continue ballooning outward, I think, is a much better long term solution than thinking that I somehow have some secret knowledge that the 99% doesn't have, or that I'm otherwise sure to succeed. I mean, the biggest danger I see is giving up after having a short-term failure of willpower. Binging one day without tracking and then just throwing up my arms and giving up. If instead of shooting for the beach body, I am simply struggling to not be a blob, and every bit less blob-like I am is progress? That's a better, more realistic long-term goal for me.
But... I might be unusual in that regard. Most people seem to think that having some special knowledge, or believing that they have .01% levels of willpower helps them actually achieve more. "The power of positive thinking" and all that. And maybe it does, for them. And I guess I think that's okay, even though I personally find it super irritating and unhelpful.
[1]https://ajph.aphapublications.org/doi/10.2105/AJPH.2015.3027...