Bagginsbill is right.
We get what we ask for. There are a lot of people (including me) who want to work with bloated runtimes and be able to manage these runtimes. I want to be able to find, pick and use props/clothing/hair and other stuff as best suits my needs/ideas. Yes, I can model them, but that takes a lot of time which I rather spend on composing and detailing a scene. That is what I like  to use Poser for.
Sometimes I want photo realism in my renders but often I only want it to look real and not necessarily be a fysical perfect representation of it. A 3D application allows you to create real and not so real scenery which you are unable to do in the real world. Here you want the illusion of reality and not necessarily the real thing.

And yes, I also want all the goodies mentioned here in this thread and more....