Dead drug dealer and a junkie can not sell or do drugs.
So if there are 100,000 drug dealers and 2 million junkies in Philippines, you are going to kill all of them? Even if you do that, it will be of no use. Every year, new users get addicted to various soft and hard drugs. These 2 million will be replaced in a short time span.
Yeah that tactics is neutralize the drug lords ,protector and suppliers of them.And in my opinion if Duterte finished his term the drug dealers and drug lords they do it again their business.