They're not moving back into development. They're adopting a new approach of producing software, which has nothing to do with the work that software developers do. It's likely that they "left" the field because they were more interested in other roles, which is fine.

So now that we have tools that promise to offload the work a software developer does, there are more people interested in simply producing software, and skipping all of that "busy work".

The idea that this is the same as software development is akin to thinking that assembling IKEA furniture makes you a carpenter.

Only it’s a bit like me getting back into cooking because I described the dish I want to a trainee cook.