It's called "salesmanship." Exactly what it was designed for, only the original designer
can say. Lots of boats get advertised as "bluewater," or "offshore," or whatever. Since none of these terms has any standard, accepted definition, it's all just salesmanship.
Not really something to get worked up about. Frankly, if anyone is dumb enough to read advertising copy and accept it wholesale--without any question--then they probably deserve what they get. Those who dig deeper will quickly realize what this boat will be good at, and what it won't.