Easier for them to compete internationally as Nestle, Lindt, etc. will have to either reduce their production or find other (possibly more expensive) cocoa sour

Easier for them to compete internationally as Nestle, Lindt, etc. will have to either reduce their production or find other (possibly more expensive) cocoa sources. Also it prevents from having internal competition between exportation and internal refining, as exportation is easy "right now" money while refining will take time and investments.