Why would a website who's only purpose is delivering blurry pictures need HTTPS?

Preventing ISPs and other bad actors from using it to deliver ads/malware?

Now thats a user problem, if the users ISP is shit. There was internet before Lets Encrypt you know?

It also prevents access for users living in oppressive countries.

HTTPS-everywhere was the second bane of my internet existence when I lived in China.

I don’t know how it is now but a decade ago you basically couldn’t access anything on https.

To securely deliver the intended content.

I'm not sure if this is a joke/meme but that is also insecure.

It neither a joke nor a meme, its a reality check for unnecessary https.