I think what the author means is that quantum mechanics is: 1. a source of serious debates about what it "really" means for us, with the Schroedinger's cat bei

I think what the author means is that quantum mechanics is: 1. a source of serious debates about what it "really" means for us, with the Schroedinger's cat being the most famous argument (it was appeal to intuition used against the Copenhagen interpretation). 2. Abused as a pseudoargument by proponents of claims like "you can heal other people with the power of your mind". As in: "how can you tell it's impossible? What about quantum mechanics?".