Stable Diffusion provides already good enough images to cover a lot of visual content online.
If you look at image shares sites for the purpose of entertainment like Imgur, you will also notice that a large portion of the viral content are screenshots from Twitter or traditional media.
Is content opinions? Most people don't have opinions on every topic on the planet. Is Gobekli Tepe the place of Noah's Ark? What's going on with Hunter Biden's laptop? How will Meta's VR strategy work out? Will it rain tomorrow in Sydney, Australia? Depending on your area of interest you might or might not have an opinion about it which you may or may not publish online.