Maybe you should lead a campaign against doctors that give vasectomies then, logically speaking.
In what way exactly is a lack of fertility harmful to the individual?
Or are you talking harm to the world?
Or are you talking potential accidental harm?
Are you seriously saying that all lack of fertility is harmful in all cases?
Or are you taking the position that temporary lack of fertility on the earth would be harmful? If so, exactly why do you think so?
Give us some real reasons. If you don't have reasons to think what you do, what is the point of listening to what you say?