Most (all?) of the time, adventure path backgrounds aren’t applicable outside of the adventure path.
Unfortunately, the background selector doesn’t include any indication of what background is from an adventure path, and doesn’t provide a way to filter them out. And we get all of the player primers from every adventure path for free, by default.
I know filtering and sorting is coming to everything eventually, but I’d like to propose adventure path backgrounds are hidden by default, with a toggle to turn them on (or select an adventure path)