In my opinion the most funny thing, when discussing about things like loaders, are people that have those legit reasons to use them. Are there really that much people that need to run backups of games they actually own in original to conserve the disc? Or those guys that want to prevent their drive lasers from getting damaged? Yeah there are in fact reasons to use some kind of loader without pirating - do I believe any of this? No!
By the way, I use some loaders myself for the purpose they are made for (comfort, keeping my discs and hardware safe,...)
Just another little question. I dumped all of my original Wii games and made backups of them. Now someone break into my house and stole all the originals. Now I just have my backups left, is this ok, or do I have to destroy the backups since I don´t own the originals anymore