The order is very much aware of the fact that humans are not the most productive or intelligent species in the universe, but they have proven they can evolve even if it happens in small steps at a time. We are still hopeful that the human race will evolve to a point that will make them a valuable asset to the order instead of being a burden that we have to babysit. It might sound harsh, but this is the truth. Humans need to be watched over because they are still more likely to mess things up than do any good.
The truth is that we feel like we can still give a chance to humans and there are also other species like the elves who want to eradicate humans from the face of the planet due to their lack of care for the world that they live in. The human evolution is still far from optimal and they are destructive creatures with very little sense of community progress.