why 3D design matters

Why do I ask you to make models, scale, design ....... why is it important for the 3D artist to consider these things before hand???

Exhibit A




taken from:  http://www.documentingreality.com/forum/f2/bad-bridge-design-30587/ 



Exhibit B

photographed by my friend T.H. at the Stae FAir.  Now, this is some bad fountain work... seriously - no where in here did they think as T.H. states
"Imagine, an asscrack of running water. It's easy if you can."