I went back and read your other post. A fitness instructor who lives in Philly and doesn't know what to say to someone who eats cheesecake for breakfast? It's a city that's been in the news for having a high rate of obesity; http://whyy.org/cms/news/regional-ne...-smoking/34232
Instead of the journal being too real, I think he's not real enough, actually. How does he think people become obese?
I mean, I'm sure you can get something out of working with this guy, no matter what his level of knowledge on the spectrum of eating habits out there (and it strikes me that a trainer should have some inkling of what eating problems/issues his clients may face; though if he wants to keep himself on the level of spending a few sessions showing someone how to exercise safely and effectively, that's obviously his choice).
enjoy the sessions and the gym! you're making lots of great changes!