I get what you mean, but from my own experience, animating and positioning 3D models is easier than with hand-drawn art like in summertime saga
Your experience shows your lack of nuance and experience with the medium. Even good positioning takes practice. It's the same as in drawing, there are good and bad poses, dynamic and non-dyamic poses.
Good 3D artists are a photographer and to that end you need good camera angles and good lighting. Either chosen poorly can ruin an image. There is only so much fixing you can do in GIMP or Photoshop.
Also,
proper animating is not and never will be easier than flat stylized hand-drawn art. Granted there are now tools to help, however, the good ones are not gonna seen in DAZ's default package.
Instead proper animating in 3D or even proper 3D photography/rendering is akin to a more in-depth 2D artistic rendering styles. This is specially true for 3D artists that make and/or rig their own models, make their own morphs or those that make set pieces/clothes themselves in programs like Blender. Hell, making your own diffuse, spec or normal map for a render can be time consuming.
I get it, you don't like stock or out of the box sets and images. However, you shouldn't be comparing that to what DC is doing. It's as fair as me comparing a stick figure artist to ISIKOL.