>>509017>and filling the gap with quads/tris would just add more shit.
It would not, a N-gon already consists of triangles. Just that the software decided where to put them instead of yourself.
Same as a quad existing of 2 triangles. Do not confuse face-count and tri-count. While polycount technically means face-count, what everyone means by it is the number of triangles on a mesh.
The lines you see on a editable object is called isolines and it's there just for your convenience as a human editor. Your hardware still process the mesh as the collection of triangles it really is.