Well , " When you create an object/mesh for example a cylinder and you click on that object or something else. You can't adjust the radius, height or subcount anymore." Those videos show you totally can starting not from a cylinder but rather an edge. With screw or bend modifier then curve modifier again . For the tree…
I agree 100% with the parametric primitives, splines, modifieres and others things like a radial array for instance. And i suspect that the blender devs have no idea of the state of blender when it comes to polymodeling, the improvements to basic polymodeling tools are so few and so far apart, and they usually depend upon…