I realize this is an old thread, but this debate occasionally surfaces in the Inventor / Fusion 360 forums as well.
One very real part of the design process that many folks might not be aware of is concept design.
At this stage, many of us rough out forms using our 'precise' tools, but we intentionally want to keep the focus on proportions, features and ideas. The last thing we want is to get hung up on details by showing a client a 'precise' drawing. There's very real value in being able to show a 'sketchy/artistic' rendering at this stage.
For those of us using Fusion/Inventor, it's a bit of a clutzy workflow at the moment. The choice is to either use some conceptual tool to rough out forms, which then get thrown away when we start detailing, or start off with our detail tools and try to figure out ways to 'sketchify' the output. AutoCAD at least has line styles.
Todd
Product Design Collection (Inventor Pro, 3DSMax, HSMWorks)
Fusion 360 / Fusion Team