This is a funny analogy because Blender was a game engine at one point and failed.
It was decided that game engine development was over complicating the goal of Blender. It detracted from actual 3D software development resources and trying to make all blender features seamless with it was nearly doubling potential work.
I believe in the open-source world, this is called “mission creep”. It means when a project gradually expands its scope and mission until it becomes unmaintainably broad.