I agree with everything you have said. But the trends in "The Enterprise" are to eschew these ideas in favor of overly complex serverless architectures with poorly specified interfaces where any pluggable developer/resource can perform hit and runs on any component. What I've seen this lead to is the most brittle, bug ridden, low quality software in my career. And the irony is it's led to none of the perceived benefits of serverless architectures but has enhanced all the drawbacks of monolith architectures.

My best guess is to why things have become this way is that middle management in "The Enterprised" reckoned "Agile" as an opportunity to commoditize software development.