> My observation is that Agile is all about software development, tuned for software development, and for the benefit of software developers and the customers of software.

No, it is not. It is definitely not for developers benefit. It is sorta kinda good for junior developers I think, but mostly it is for management. It effectively ignores human psychology, treats developers as machines and individual developer is mostly powerless with no responsibility, no accountability and zero autonomy. It effectively amounts to large dose of micromanagement.

It may sound weird given agile rhetoric and some its processes are really good and improvement, but in it is does creates pleasant work environment in practice.