It is, but since it is so easy to host, there are places like that website where people run it and let anyone try it out.

The problem with dalle3 using some prompts is that they want to be more sure that what they output is accurate, safe, etc… but with stable diffusion it just gives you the genuine output of the algorithm so you can just sit on your keyboard or whatever you want and it will at least show you some sort of image for it.

That too.