THANK YOU for this. It kind of ends the conversation regarding handlebar bags for me:

"This area of the bike is subject to extremely high amplitude/high frequency vibrations and road shocks and is not kind to delicate camera equipment. Hanging a weight off the front of the handlebars amplifies the effect (think road buzz)."

I'm going to play it safe and use a backpack so I don't damage anything. Even if other users rode X amount of miles with no damage, every bike is different and I wouldn't want MY camera to be subject to vibration, especially because I like my PSI on the higher end.