?  Nobody is burgling anything with drugs.

You have a group of people that put resources into growing a plant.  Then you have a group of people that are willing to use ultimate levels of violence against you for growing a plant.

The fact that all of this is lost on people even after years of prohibition is probably why we still have to deal with this.  Weed is legal in Colorado and you can't keep the illegal grows out because the legal process still makes it profitable for "criminals".  I mean, this is just basic economic logic.