You are confusing Crohn's, an inflammatory bowel condition that is life long and can often be disfiguring and requiring surgery with IBS which is completely unrelated, non-inflammatory (if it were then it would not be IBS), with distressing but not usually life limiting sequelae. Do you even know what IBS stands for?
The fact is we do not understand the complete mechanisms of either Crohn's or IBS, but based on their presentation and treatment it is unlikely they are too closely related - and it is likely that IBS is itself due to multiple factors - hence it is a syndrome, not a disease.
Given this, it is hogwash to say all of any kind of condition is caused by one thing. And if there was a cure with 95% effectiveness, I am sure many of the affluent IBS sufferers on this site would have figured it out by now.
> and the cure rate for fecal bacteriotherapy is about 95% in one shot. It's ludicrous that we're still studying this and acting as though it's such a mystery.
This is crackpottery.