I know what you mean, Cali, but if I were his client I don't know if I would consider his struggle the same as mine. Here's why.
In my experience - which may not be scientifically valid! - weight that goes on quickly also comes off quickly (and although he's putting on fat, all his muscle won't be disappearing in the time he's gaining - you can see in the photos that his muscles are still there, just with a layer of fat over them), and of course the eating habits that led him to put on the weight are an aberration rather than the norm for him, so he won't have to re-learn how to eat when he starts to lose - he'll just be going back to what is normal for him. In my opinion his experiment is ignoring some of the main aspects people struggle with when losing weight:
1. Having to retrain eating habits, both types of food and portion size - he already has good eating habits, he is just ignoring them for the duration of the experiment.
2. Mentally adjusting to the idea that they can/will be slimmer - he is familiar with what his body is like when it's healthy/fit, and he knows he can achieve this because it's his usual state of being.
3. Losing weight that has potentially been around for awhile, and having to build up muscle tone from scratch - his muscles are mostly still there and will greatly aid his efforts when he starts losing, and all his fat will be 'new' fat.
And I agree with you that I couldn't personally relate to the need to lose only 7 lb, but I can see that for people who have always been quite slim, even that amount can be significant to them and make them feel negatively about their weight too. I think we're all in it together.