Fanny packs very near useless?

Are Fanny packs actually a trap? Especially with the organized trait you're just putting more in a bad storage

It would be way better to carry your essentials in your main backpack until it's filled up first THEN start adding items to the packs?
At that point I'd rather keep and extra backpack to carry in my offhand.
On top of the fact that they reduce run speed by 2% each.