The reason I'm cynical about security theatre is that I first made a presentation about gaping gaps in the security system set up to protect commercial air transport post 9/11 in 2004. I highlighted 2 cases, emphasising that they were examples only; one was abject failure to ensure that cargo was subjected to the same level of scrutiny as passengers, crew and baggage, and the other was the pointless, ineffectual pantomime that fails to ensure that an aircraft being returned to service from a non-secure environment, for example after heavy maintenance in an area outside the security zone, cannot have any concealed devices anywhere using timers or barometric triggers.
On that occasion, and many since, I have been advised that closing those gaps would shut the industry down, so for God's sake shut up about it.
I know that closing all the gaps is probably impossible if we are to continue carrying passengers, cargo and mail commercially; and I'm not advocating that we should try and do that.
But let's stop pretending that the security theatre in the departure channel is any more than a meaningless pretence that people will be safer on board their aircraft because an semi-literate moron has confiscated their sandwiches.