There is a lot of controversy between the low impact scattered and low impact concentrated camps. I'm sure there is less awkward language. In essence, some contend that to scatter the camps into less used areas reduces the long term impact on any given wilderness environment. Others claim that any impact is too damaging and so designated campsites are preferred because at least all the impact takes place in one spot and so is not as overall destructive.
Near as I can tell, they both have their points. I usually used previously established sites simply because they are there and often provide amenities such as lpgs or stumps to sit on. I am having to rethink some of this as I become more hammock adapted.