Random is not market related but person related. Those who have the knowledge see non random markets, those who dont have the knowledge see random markets.
Scientists who try to find a medicine to threat a disease, first have to understand how this disease works. Until they find a cure the behavior of the disease looks like random. Once they find what causes the disease, the behavior is not random anymore and a new medicine can be developped. The disease never changed from random to non random, but the knowledge changed and by that it changed the opinion from random to non random.