I agree that there's some overly enthusiastic worshipping of the ship going on. I believe that, if she had not sunk, the people that display this behaviour, would not speak of her at all nowadays.
So yes, I do think that it is the disaster that made her the "greatest ship of all times" to some of you.
Had she just been taken out of service after she had become obsolete, she would have been not much more or less than her contemporary counterparts. There would be no movie made, there would be no museu,, there would be no self proclaimed experts that worship her.
Luxury is relative. The liners of today offer much more than they did back then. I second mvsmith's remarks. The materials she was built from were not all first class, the engines outmoded, the safety requirements inadequate and some of the people that are said to be "hero's" actually ran her in such a way that she sunk.
Greatest disaster at sea? Yeah, I guess so... If you don't count any of the war related sinkings...
What about the Wilhelm Gustloff.. an estimated 6 to 9 thousand refugees where on her and most of them died in that nasty attack... Why doesn't anyone talk about that then? Or the sinking of the Goya (6000 wounded and refugees). Or the Armenia (5000 wounded/refugees), or the Awa Maru (2000 civilians), or the Tsushima Maru (1500 schoolchildren en civilians) to name a few.
And greatest ship ever? Nope. Not by a long shot. Sorry. Set against her type/class and how well she was built and equipped to do that job, she's not the greatest. There are many many other ships that did and do their job much better and much safer. I'm not just talking about luxury cruise liners, I am talking about all ships, and if you call something the greatest ship ever, you must take all ships into account.. I think a nimitz class carrier would be a bit "greater" than the titanic. To name just one.
Regards,
Fred