My guess is that "There are no neutrons flying around" is a flippant way to say it's not ionizing radiation, since the common ionizing radiation is made up of a

My guess is that "There are no neutrons flying around" is a flippant way to say it's not ionizing radiation, since the common ionizing radiation is made up of alpha particles, beta particles (electrons), neutrons or very high frequency photons. Imagine it says "It's not like there are high speed neutrons flying around".