I think you'd be also stunned about the custom scripting/tooling studios have built for themselves over the years. Like the Blueprint system of Unreal, and plenty of low-code scene editors and map editors.
Since games are fuzzy, it's also important that developers are in touch with the underlying systems of what makes the games games, and that requires understanding those systems -- easily done through writing and modifying them.
Since games are fuzzy, it's also important that developers are in touch with the underlying systems of what makes the games games, and that requires understanding those systems -- easily done through writing and modifying them.