Does a captain's license affect recreational sailing?

Is it possible to combine a captains license, with recreational sailing? The purpose of obtaining the license was only for the legitimate title of ‘captain’. (seems silly, but that is the question)

Is it possible to take the common ‘six-pack’, operator of uninspected vessel (OUPV) exam to get the title of captain & then sail for recreational purposes without the limitations of the license? The OUPV has strict guidelines on the vessel, including tonnage, paying passengers & no international waters. But those apply to commercial vessels like whale watching & tours.

Side questions:

Can you sail (recreationally) in international waters with no captains license?

Once you pass the exam to become captain, are there certain limitations/obligations you have to abide by, even for when you sail recreationally?