BV, DV and detail of design

FACT: BV's add detail information and smarts to elements. FACT: BV ALSO SLOWS THINGS DOWN GREATLY? With that in mind. I look at the examples used for building models with BA and NONE HAVE DETAIL? in fact I can create them all without BA? I can load them in MS and do the same in MS without the speed and crash issues So why use all the BA stuff unless it is to produce wall section (1/2" scale) drawings SO I ASK THE ORIGINAL QUESTION OF BENTLEY? WHAT IS THE PURPOSE OF BA? DO WE DRAW DETAILED MODELS TO A RELATIVE SCALE TO BE USED FOR PLANS AND SECTIONS OR DO WE DRAW OUTLINES????? It makes huge differences from the first drawing created and how we do every piece of work within this package. HELP PLEASE