You're not reading someone else's RP, though. Not with the applications that support this.
There are things like the character(s) you interact with, the initial setting, and some background information predefined, but the responses/evolution of the RP vary depending on things like the model used and the user's interactions.
It's somewhat like taking a D&D setting/scenario. Each group plays it differently.
Ah, the point I was trying to make was more akin to “why would I read your AI-generated story that you’ve posted as a static text/ebook trying to make a profit when I could do [essentially the scenario you described].”