There's no doubt it's an RP ship - no one's buying this thing for any reason other than because they can and they want to be seen in it.
Still, the idea than an 'RP ship' has to be rather terrible at combat implies that combat is oorp and for pvp whores. Not a great statement.
Fact is, this is a ship for people that can have anything. And it seems like people want something with a little more. If this was the real world, there'd be another ship that was a little better, and that's the one everyone would buy.
Personally, for me, it's just a looks/knowledge thing. I'm not going to roll into any PvP, not unless I'm attacked, and even then I'll probably try to flee. But I'd just like to fly something that had a little firepower along with everything else the yacht has. And isn't flying something you want to the entire point of the yacht?