If it didn't add any value to the platform do you think @dan and @ned would have included it? Make a suggestion to the witnesses to support removing the downvote button all together.
From the FAQ:
What are the valid reasons for downvoting?
Users are allowed to downvote for any reason that they want. There are many users in the community who recommend only using the downvote on posts that are abusive. It is up to you if you want to follow this etiquette.
Does a downvote mean that I did something wrong?
Just because you received a downvote does not mean that you did something wrong. The downvoting person may have just been voting to reallocate the rewards in a way that they felt was more beneficial to the other active posts in the platform. Often users will leave a comment explaining why they downvoted, but sometimes they might not. If they left a reason, it is up to you to determine if you did anything wrong, and if there is anything you want to change.
Maybe more people should at least read the FAQ before actually agreeing to use the website. People start playing games without reading the rules of the games and then are surprised that they don't like some rules while playing them.
If you were shot by a lone gunman it doesn't mean you did something wrong. Anybody who posses the gun can shoot anybody or anything according to the person who sell it. Ability doesn't mean it's a Right. If we walk this path we could simply be flagging each other in a flagging war which would be extremely counter productive.
A gun is designed to be able to shoot and kill. But only in certain circumstances the firing of a gun is justified.
How you arrived at that conclusion from what I wrote is beyond my understanding.
It's a metaphor.