The point was that even though Nemesis’s swords weren’t copies of lightsabers they still weren’t unique looking. There are other examples that predate RB that aren’t green like those in Scott Pilgrim and Game Of Thrones:A sword that has a magic green flame wrapped around it?
What’s sad is that from what I’ve read Snyder did create a fairly elaborate backstory for Nemesis that explains her use of the swords and their significance in her culture, he just neglected to put any of that on the &#%*! screen for the audience.