Back to Basics
It begs the question "What is the security in place to secure or protect?"
Is it the aircrew? In that case causing us stress and / or difficulty in completing, or even starting, or assigned task is an abject failure on the part of the DfT.
Is it the aircraft? We are responsible for the physical security of the aircraft: we have to secure the aircraft when we leave it. I don't see the airport providing security staff for that. Even if the aircraft is on the ramp we can't leave it with the steps attached, doors open because it is "unsecure". So if the ramp and airside is an insecure area why are we checked and subjected to search and confiscation every day?
Is it the passenger? What are the securing them from? Is it us? Then it raises another query in that WE are responsible for the safety of the occupants as soon as they board.
The whole thing is a can of worms and persecuting aircrew is an easy abdication of responsibility for security.