Criminals specialize too. Silk Road and similar drug bazaars weren't selling hitmen services. In fact the original SIlk Road used to sell guns but the owner had second thoughts about that and eventually banned their sales so someone else created "The Armory" to make up for the bannings.
His point about selling drugs through online being safer is correct since you don't have to deal with face to face encounters anymore.
What I don't agree with is that the government shouldn't shut these businesses down. Drugs are still pretty harmful depending on their addiction potential.
Also the end customer may be getting it in a "nonviolent way", doesn't mean a dozen people didn't get murdered in Mexico to get the drugs onto the market in the first place...