Ionizing radiation, e.g. the "stuff" emitted by radioactive materials, is dangerous to humans since changes to the electron configurations (in the human body) causes the various molecules (in the human body) to change their shape (i.e. break down or form new ones), which can have all sorts of devastating effects..
But why is it any less of an issue if this ionization occurs through more mundane means, like walking over a wool carpet with leather/rubber shoes? Is that ionization any different in quality?
Similarly, why can't the excess/shortage of electrons caused through ionizing radiation not be simply compensated for by "grounding" people, as it occurs with static charges?
..or is perhaps my understanding of why ionizing radiation is an issue for humans a wrong one to begin with?