Why can’t molecularity of any reaction be equal to zero?

Molecularity of any reaction cannot be equal to zero as molecularity is the number of reacting species taking part in an elementary reaction, which must collide simultaneously in order to bring about a chemical reaction. So, zero molecularity means there is no reactant, as a result of which a reaction cannot occur. So if there is a reaction then its molecularity will be greater than zero.