People go to Auschwitz so The Titanic is no big deal, me personally not a chance I want to feel happy when I spend money on a trip.

I might just be a shitty person but i love history sooo much and i don't think its that awful to want to see.
People tour battlefields and stuff too
Personally i wouldnt want to see the titanic anyway but i don't think touring it is a horrible thing to do