Your numbers might improve, but there is a change if you don't find good candidates, you have to fill them in with bad candidates. This could make things worse

Your numbers might improve, but there is a change if you don't find good candidates, you have to fill them in with bad candidates. This could make things worse in the long term because all those poor candidates results in a reinforcement of the assumptions that men are better at <insert job>. Except for politics, can't be bad at having an opinion ;) Or jobs that any human should be able to perform.