@Infoseepage @WellsiteGeo With drug smuggling, it's okay if lots of attempts get detected. It's just part of the cost of doing business. It's not going to make the DEA go after you any harder or softer either way.
But if nuclear materials get detected, it becomes a big international ... problem. It's the sort of thing that will result in a humongous international coalition regime change invasion.
The risk/reward calculus is totally different.