Correct, a Non NV scope will burn a bright spot in your tube. Sometimes it can be gotten rid of, but usually it is permanent. However, if you have a PVS-14 that you want to run with a NON-NV red dot sight, just get a $15 IR passthrough filter for the 14. It will allow only IR light above a specified wavelength to pass through. I have a loaner setup with an old 2AA PVS-14 and an EoTech 512 which is not NV compatible, so I leave an IR filter on it.More like the daylight dot will permanently burn an image into your intensifier tube. If it is bright enough to see with your naked eye, it is bright enough to damage a tube if kept focused on it for long periods of time.
Not sure where you are getting your info from, but sounds like some BS you'd hear at a gun store counter.