Yeah. Each country perceives and responds differently to the risks presented. Searching or destroying unattended baggage means that it will be manipulated, and that in itself can trigger a detonation. Dogs are a means to detect explosives without first manipulating baggage. Same with ETD when done properly, but dogs are much more mobile and response-ready than portable ETD machines.
In that sense, I think dogs should be included in security patrols and contraband interdiction. Dogs can be trained to a specialization and assigned to a handler who is under the security staff roster or the customs staff roster.