I can agree that developers can encompass skills other than programming—mapping tools are a great introduction to level design and basic optimization*. The harshness of my statement is derived from a growing aversion by amateur devs to learn programming, and AI vibecoding has only exasperated this. As I work on my own project, I continue to discover new challenges that I'll eventually need to overcome; likewise, these devs should develop a bit of humility towards the requirements of making a game, I have no qualms with "plug-and-play" engines or asset flips, but more pride should be taken in learning and implementing good programming.
* Source 1 Hammer is out of date in terms of modern standards and is limited in terms of gameplay extensibility, but it is relatively easy to setup and run.