A little chaos is definitely good for us, because if everything is going smoothly, not demanding extra efforts, patience and out of the box thinking..well, we will stop actually putting our thoughts into what we are doing and basically act like a machine. For example, a small crying session because things did not work out as you planned is such a good lesson for future. No chaos means no fun. So yes, chaos does compel our brain to think and act and adapt to any situation!