“Because it makes good business sense” has been a valid argument since 1997. If anything, that argument is actually becoming less valid as time goes on, as the proportion of the Star Wars fanbase that has actually seen the Star Wars trilogy that started it all decreases.
It will always make good business sense. There always has been and always will be a market for the unaltered films. Things we infinitely smaller followings have received releases in the past. The producer’s cut of Halloween 6 was released on bluray recently as the selling point for the Halloween box set, and in 2013 the original mixes of ZZ Top’s studio albums were released on CD for the first time since before they had been altered with new percussion in the late 1980s. There really is a market for almost everything, but especially Star Wars. Despecialized Edition has proven that there is a market for the OT. Whether the fact that there is money to be made will motivate Lucasfilm to them releasing the films is yet to be seen, however.