I don't understand your context of destroy in this case. Are you coming from the angle that Spirits Within is better or worse?
Maybe "destroys" isn't the right word, as TSW isn't good at all and the others aren't that much worse: AC is alright for what it is, but outside of that it doesn't work and even then, it doesn't really fit FF VII. KG is the same, but with awful directing and editing, as well as acting (only watched the English version, so I can't talk about others) and its "standalone quality" doesn't really exist (in AC you could argue that you had to be a fan to understand it all, but that makes sense as it's a direct sequel).
Still, if it makes them money, keep producing them, I guess. Can't say I'm excited about them anymore, although the visuals are generally good to great (I particularly like AC's fight scenes and Insomnia's look).