Reddit forbids sad content on their r/aww community

The subreddit r/aww which is a large group of users who are on the site to post "Things that make you go AWW! -- like puppies, bunnies, babies, and so on"  cannot post sad stuff. Good or bad? Strange or common sense?

It just seems very unnecessarily controlling to me. Sometimes things that make you go aww can be slightly sad. 

These are the rules on reddit.com for this 'subreddit'.

Pretty strict, I'd say. It seems that the admin boys have learned from experience that a lot of rules pays dividends. They think that they have to have them as users tend to do naughty things.

It also has to be original content. I wonder if they'd allow an image created by an AI computer to the specific instructions of a reddit.com user? Each time you do that the image is unique and created for the person giving the instructions.

For instance here is an image created by Bing's Copilot to the following instructions for the r/aww subreddit.

"Create an image with barn cat mother feeding her four kittens in a bed of hay while the setting sun shines through the barn door as a horse stands near the door."

Here is the image created to order. Not bad.

Here is the reddit post. Reddit admin deemed it to be original content. Great. It is what I thought they'd do. Or hoped they'd do.

An AI created r/aww image to order. Is this original content? I think it is. I asked the AI computer to "Create an image with barn cat mother feeding her four kittens in a bed of hay while the setting sun shines through the barn door as a horse stands near the door."
byu/broadsurf inaww

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P.S. please forgive the occasional typo. These articles are written at breakneck speed using Dragon Dictate. I have to prepare them in around 20 mins.