Well, it protects the tank, and that's it (you're the one who regards protection as more important than absolutely anything else, so you should be happy that the PT-91 has one, or not?
).
Of course laser warning systems are not unique in the world. He probably wanted to say that the system itself is not used by anyone else so far, and than indeed expressed it a little mistakable. Or maybe he is simply no armor expert. I don't know this particular magazine and it's general quality, nor this particular author. I'm sure you could contact him via email if you really think his work makes you drop dead or laugh or whatever.