"Profoundly immoral" is a very modern and capitalistic perspective. A free exchange of ideas has been the basis for human advancement up until the printing press made exact replicas trivial.
From a capitalistic standpoint, they are clearly in the wrong by basing their models on illegally torrented content. But it's hard to argue their usage isn't transformative.
Nobody said that it's useless, that's a straw man.
But it also isn't a free exchange of ideas. It's a concentration of capabilities in the hands of a few corporations.