I wish there was some test you could do that would prescribe the perfect diet for your body.
Discussion
We'd need to understand the functionality and types of millions of bacteria, and the profile of these an individual has in their bodies first..
I don't see a "perfect" diet script being created any time soon. Also, it is likely that such a diet would ideally change over time, possibly daily.
I think you are right about there just being too many variables.