Why enterprises keep trying to resurrect self-service developer platforms

I for one love Heroku.

As a dev, the last thing I want to do is solve a solved problem. Building a docker image to allow me to red-green deploy sounds about as exciting as writing an XML parser.

As someone who pays for dev time. I can spend > 100k for an ops expert, or pay a small fraction of that to have something like Heroku handle it for me. They do updates, I don't care. 200$ a month and I'm cooking with gas.