The API has code for constructing transactions and broadcasting them to the blockchain. Is there a reason you wouldn't want to use that?

It's more curiosity about what the blockchain itself is capable of which might inspire a different idea of how I can interact with it (rather than as a blogging platform).

My current plan is to use the existing brodcast functionality with data stored in the meta data of a post which I'll retrieve, manipulate, save and then broadcast a response. No doubt with huge timing and scaling problems along the way.

Pick four sentences: a simple creative writing game and it occurred to me that somebody could turn that into a Steem activity (find some way to query public domain books to generate the four random sentences, provide a UI for writing the story around them).

You could probably get ChatGPT to generate that for you these days - it could probably also generate the story too but that would ruin the fun somewhat.