Would finding out that obesity is caused by bacteria or viruses change your perspective on it?

I have noticed in other threads that people assume obesity is due to a lack of willpower or failure to take personal responsibility.

A recent study in the journal Science suggests that an interaction between the immune system and specific populations of bacteria in the gut may change your susceptibility to obesity and related metabolic changes. (Here’s a less science-heavy summary.)

These findings are still very preliminary and it’s hard to say anything conclusive. But if this theory continues to be supported by research, would that change your opinion of obesity, or would you still consider overweight people to simply be weak-willed?