I don't know if it is fair to think your therapist feels the way yalom does. You're just kinda assuming he does and feeling badly about what you think. Yaloms feeling were soooo out there (borderline pathological) that it would be hard to find someone with such an elaborated belief.

In fact- i bet your therapist cares very little about your weight. Perhaps it would be good to talk to your therapist about the yalom chapter.