For those seriously thinking of making money with the GPT Store, why not create your own SaaS app/service?

I know monetization is restricted to the U.S for the moment with a revenue-share model à la Spotify but besides the fact that no coding experience is required and there’s already a market of ChatGPT plus users, why not build your own SaaS business using OpenAI’s model?

edit: especially those with proprietary data