I didn't interpret it as mean (but I see why someone could) but it raises a point different from 'I disagree'. "I studied this stuff intently" is a simple appeal to authority and does not make an argument credible. In this case, it does not tell anyone why central banking is the best idea since sanitation which is a very strong claim that needs some better support.
I agree that studying doesn't automatically make one an authority, and comes across as an appeal to authority. OTOH, prefacing the statement I replied to with "Obviously..." just came across to me as "it's obvious, because you don't know what you're talking about". Maybe I'm just reading too much into it.
