Silly you...Anyone who flies on an airplane...first class/business class/coach..
It does seem kind of silly to have steerage class on a luxury liner today though. People don't book cruises because they have to be somewhere. A hundred years ago, many travelers were looking for the cheapest one-way ticket to America they could find. They weren't taking a vacation.
Another article I read says there will be no television or internet and guests will be required to wear period-era clothing (which will be provided for them). I don't see this endeavor making much of a profit.