The thing is, just because you don't run into issues (as far as we know) doesn't mean it's good advice to a new grower or someone already experiencing problems. Someone new to coco is almost guaranteed to run into issues with too much plain water and/or dried out coco.
I re-use my coco (roots and all) until it's dust but I would never recommend that to a new grower. If I mentioned all the things I do growing in coco half the forum would collectively freak out. Just because I do something and get away with it, doesn't mean it's good practice.