Yeah, pretty much, you need large areas outdoors for the soil to settle, add whatever you want to add to make it useable, and it still need several months to settle, and you gotta go out and turn the soil a lot. It could work on a large scale grow op, like a farm, but for small indoor grows its definitely not worth it.
Also just to be clear, Only organic growers who are using actual soil should even try to resuse it. If your using a mostly pete-moss mediums like Pro-mix then this should in no way ever be attempted, just throw it away, neutral soilless dirt mediums get acidic over time and break down.