Nope. "Of all the men and women here, one will prove his worth" is grammatical and does not imply a man IMO. I'm not defining myself right of course, just clarifying why my contrarian claim is coherent.
How about "every married person should love his husband or wife"?
As per a recent comment this thread is meant to voice contrarian opinions, that is anything this community tends not to agree with. Thus I ask you to post your contrarian views and upvote anything you do not agree with based on personal beliefs. Spam and trolling still needs to be downvoted.