And then they make whatever need that is sound general and ubiquitous. Same trick, but way more powerful, than what FreeNAS does. FreeNAS says "to get X you need to do Y" but don't mention that X isn't something you want, they present it as a foregone conclusion and people just get suckered right into that. At least FreeNAS never pretends to be neutral or giving advice. People just convince themselves of that.