A common trope of DeNiArs is that DNA is damaged more than 30.000 times a day by endogenous damage.
Therefore, so the stupidity goes, radiation doses pale in comparison, and just ignore them.
That's dumb for several reasons, arithmetic being one. Add 2 positive numbers together and the sum is bigger than either starting number. Damage plus more damage, is greater damage.
Endogenous damage occurs via chemical reactions in the eV to 100's of eV range of energy.
Ionizing radiation is in the 1,000 eV to over 1,000,000 eV range.