Bleach can be very necessary in a house if you are trying to contain illness or get rid of mould.
However, it also can cause me joint pains, headaches and a sore throat. You should see what it does to a silverfish! We had a silverfish in the shower, and as it was too far out of my reach to grab, I sprayed it with what was close at hand: bleach. In a minute or so, the silverfish stopped moving and then it disintegrated, losing colour first and then shrinking. Bleach is very strong.