For that scenario to be possible, general AI needs to be developed first.
A huge (and awful) part of software engineering is figuring out what exactly the stakeholders want you to build or fix. Sometimes, they themselves don't even know.
Dealing with ambiguos jira tickets, poorly reported bugs, non-existent requirements, missing or outdated documentation; these are the "common problems" in building software. Current AI technology isn't even close to being able to sort these types of problems today, and it won't be until a monumental breakthrough in the field is achieved.
Generating art is "easy" in the sense that art can't be wrong or right, it just is.
Generating the backend of a streaming platform? I'd like to live long enough to see it.