This advice keeps coming up. But it seems to be a "in a perfect world" scenario. I'd say count your blessings if your city is in a fellowship/neighborhood where this is reliable.
In my cities (lower chapter), I produce unboosted goods. Because neighborhood trading zones and fellowships are not perfectly balanced having excesses/shortages of particular trade goods. Also, I have no control over what or when other players post or accept trades. Waiting a day (days?) or resorting to the wholesale trader is not preferable to producing unboosted goods. I am frequently glad I don't have to rely on trades for all my unboosted goods, esp scrolls.
In point of fact I started out "boosted only." But, I found myself adding unboosted good production as trades simply weren't available in a timely fashion or at all. I always checked with the trader 1st when posting trades for my boosted goods and it just didn't work out. Maybe when I reach a higher chapter (not early game), I will have more resources and change my ways.