If you can automated away the reason for being at the destination, then there's no point in automating the way to get to the destination.

similar for automating creating an interpreter with nicer programming language features in order to build an app more easily when you can just automate creation of the app in the first place.

"Because it's a shiny toy that I want to play with" is a perfectly valid reason that still applies here. The invalid assumption in your premise is that people either enjoy coding or don't. The truth is that they enjoy coding some things but not others, and those preferences are very subjective.