The advice is universal. You're picking and choosing points you don't like to excuse yourself from the commitment.
The best thing you can do right now is sit down and make a meal plan, then go shopping for it, today, right now. Here: chicken , frozen vegetables, water. Cook it all, then eat as much of that to feeling totally full, with your choice of sauce, and you will lose weight. Guaranteed. No exercise required, no limits on how much you can eat.
Additionally, the metabolic response to overfeeding varies greatly between individuals; some people respond to excess calories with a significant rise in body temperature and heightened energy, while others show no change in body temperature and actually get tired after eating.
I'm not saying that "slow metabolism" is a legitimate reason someone can't get fit. Only that it isn't fair to assume everyone is the same; some people DO have a much harder time losing fat and staying lean.