Re: concept art and set photos!
The Titanic was a passenger liner, not a ship of exploration. I would think the expectations of passengers, especially the well-heeled, would be different from the crew. And I would think the crew of an explorer ship would be expecting their ship to be designed differently from a passenger liner. Form matches function.
It's also going to play host to diplomatic functionaries at some point. There's no reason to assume that they also wouldn't want to create a level of comfort for the crew. Particularly assuming that they were designing the Enterprise for a long term mission.
"Life should be revered simply for the fact that we need to be thankful that we are currently able to consciously appreciate what we are going through right now. ... This moment that we're having right now is highly significant." -Maynard James Keenan