Real talk it is. "Bicarbonate of soda" is not a thing, either say baking soda or sodium bicarbonate. Sulfuric acid is water soluble, there is nothing wrong with washing it off under running water. There is a bit of a problem if you are washing off a lot of acid (i.e. you stuck your whole arm into a vat of acid) or if you are using a container with water rather than a source of running water. When sulfuric acid gets diluted a lot of energy gets released, so if you have a lot of acid or not enough water, you might get burned before the acid is washed away.