I personally do not use my BOB contents, ever.
I make sure that I leave my BOB alone (but review my list of contents often) so I am certain that the items are there when and if I need them.
To each his/her own
Wow... your first line had me concerned until I read the second... and now I'm only partially concerned. Well... not really... since you and I will be prepping and surviving without any help from each other. But... as a fellow forum member... I do care a bit.
Just to clarify... Using your BOB doesn't mean depleting your BOB. It's the same as rotating out stored food.... you don't eat it and then go shopping for more. You shop for more... swap it out... and then eat it. So... if you are going to use up the batteries, or food, or matches, etc in your BOB, you buy new ones first so you are always ready to go.
I'm always amazed when I go backpacking that most of my friends have to rip their packs apart to find that one item they need because they have no experience with it. So... let me offer you a friendly critique. You packed and maintain a BOB. One thumb up. You review your contents regularly. Two thumbs up. You DON'T use your BOB and get experience with it. One thumb down.
Sure... you may know how to use each item in it and may even have spares that you use in the woods (in which case... I'd give you another thumbs up). But... there is a special experience that comes with knowing exactly where something is and being able to find it and use it... say... on a pitch black night... with a bear or bad guy creeping around. Or... trying to pull out that one barter item without the guy you are trading with seeing what else you have in your BOB.
But as you say... to each his/her own. Just my $.02