Very valid point indeed. I average one close call every couple of days ridsing thru town on the way to work. Not even intersections just people flying out of stores into traffic nearly t boning me.
Also I think loud pipes alert the deer lurking along the road at nite.
Its almost a quiet versus safety issue. On one hand I prefer quite but on the other hand the loud pipes definatley do let people know you're near even if they cannot see you.
I may ride the perfectly good and new stock pipes the first 2-3 years and swap out to the V&H high out put headers and slip ons and use the SE racing super tuner to dial it in.
For the deer you can get a couple of those whistles that attach to the bike, for the knuckleheads that don't "see" you no matter what you try disco balls - led's - neon - pulse beam- without that sound they will never know you are there.
Be super careful in parking lots I've learned no matter what you have they don't see you.