"Rather then waste time on trying to fix these issues on the mesh, it's far easier to just do the corrections in Photoshop on the render directly. Or get yourself a real sculpting app like ZBrush or Mudbox and go nuts on creating models that are 1000x the detail/quality of what poser chokes on."

Yeah right, smearing paint in Photoshop over a 2d render because one can't figure out how to do a proper rig sounds like a plan.
Reminds me of the first model planes I built when I was 6 years old. I didn't care if glue spilled out from the seams, 'cause I thought I "could always paint over it later".
Thankfully my modelling skills developed quite a bit over the years.

Shows you really did not grasp what 3d is actually about:
Creating a virtual world you can actually "enter" and "walk around",
If you "postwork", you go from a 3d model back to a simple 2d picture.
What if you want to change a pose ?
What if you want to render from a different angle ?
What if you re-use that model for another render ?
Oh, wait, yeah...you "postwork" again...
..and again...and again...and again.
Sorry, my time is too precious for that.
I rather fix my meshes ONCE and be done with it.

As for ZB3, I have it.
Nice tool if you want to create meshes from scratch.
But to fix and make custom morphs for Poser meshes, the MorphBrush is a lot more practical.
And as I said, if Poser isn't good enough for your ambitions, noone stops you to use a more professional tool instead.

BTW, MorphBrush morphs can be animated like any other morph, too.
So they are the PERFECT solution for Poser animators.

Unlike photoshopping.