That theory makes as much sense as the theory that "chemical imbalances" (i.e. low-alcohol) cause social anxiety.

Alcohols are produced in your brain naturally and adding more changes behavior. Clinical trials show that more alcohol increases sociability compared to placebos (but with side effects). There are some concerns about giving alcohol to three year olds, but it is better that they become socialized at a young age than deal with the consequences for life.

In short: science + tons of money = not science.