Earlier quoted context omitted.
Although a decent chunk of modern tooling is there to handle the limitations of triangles. And modelling is often using higher-level abstractions that are only turned into triangles at the end of the process.
That's true if you're using a CAD-like tool, but that's typically not used for art (more for engineering / mechanical design) Game / VFX artists heavily use mesh-based tools such as Maya or Blender.
Both have many tools that aren't raw triangle editing