Matthew- it is not profiting from a disaster by the standards of our day, and certainly not by the standards of the day in which the Empress was lost. The selling of 9/11 artifacts, viewed with revulsion in the present (by some) would have been greeted as par-for-the-course had the event happened in 1914. You've seen the famous photo of the souvenier stand selling "Earthquake Debris" standing in the middle of a sea of earthquake debris anyone could have taken for free, San Francisco 1906, haven't you? You've read the account (by a credible reporter) of hucksters in the street in front of the Triangle Factory selling cheap costume jewlery as "rings from the finger of a dead girl" have you not? Seen the "before and after" lithos of (usually female) crime victims suitable for in-parlor display? Familiar with the stereocard of the Civil War soldier blown in two with the cannon ball TOO artfully placed in between his disarticulated pieces (photographer must have dropped it there to aid the compostion) and his face showing?
ALthough, by 1914, the Victorian obsession with violent death was on the wane, I can assure you that had it been possible to recover Empress artifacts cheaply, someone would have done so and sold them. And they would have been displayed in "curio cabinets" next to pieces of rope cut from the nooses of famous
criminals, walking sticks made from Sultana debris, pieces of fused ironwork from the ill fated Windsor Hotel, and other souveniers de morte.
And, as for your specific present day examples, it is FAR from the same thing which, had you taken the time to think before you wrote that, I'm sure you would have realised. The WTC disaster is still recent enough that there is a plentiful supply of survivors, and friends and families of victims, to be potentially offended by the sale. And, yes, since I know what is about to be asked, I know several survivors and, as it transpired, knew several victims. In 91 years, the WTC debris will, like that of the Empress, have moved from symbol of living history to historic curiosity, and at that point the legal sale of it will NOT be offensive.