Laced with sarcasm, for your awareness ;P
FD implemented it properly given the design of the game. Be happy they do have a non-open option. Private groups are a great idea, especially for groups of people who want to play together in an environment left unbothered by those who call themselves pirates but have no interest in any actual cargo (thus they aren't pirates but rather playing a sociopathic type). A perfect example of this is the streaming crowd. If they didn't have private groups, morons would be hopping in to disrupt streamers just for the sake of doing so. The "look ma! I'm on TV" small brain mentality.
Keep this in mind. **Its a darn game**. People should stop treating it like some all life important matter. These are what are better known as "first world problems". Just turn on the news, its filled with nonsensical drivel and vast bulk is propaganda and mass distraction. Who wore what tacky outfit at what event, who showed who's behind to whom or some such. When you don't have food on your table or when you have a war on your doorstep, then we'll talk about real problems ;P
My only explanation of the complaint of the person quoted by the OP is he may be suffering from "drain bramage". He probably cares more about the refraction index of Kim Kardashian's behind under candlelight than getting a proper education and building himself an actual career.