You can. You eliminated those bad triangles from the "arm" that holds up the lantern, but now you have what is called an "nGon", which can be even worse than triangles. An nGon is basically any polygon with more than 4 vertices. The best practice of "best practices" is trying to make a model that only has quads (4-vertex…
As always, there's an ideal form and then there's real world. And real world is a b*tch! Here's the point: usually you don't just cut your model's edges into tens of vertices to get a smooth curve. You place some key vertices (like in a bezier curve), some creasing (to keep certain edges sharp), and then you hit the…