You criticise aircrew screening as not being worthwhile, because pilot's have control of an aircraft full of fuel that in a worst case scenario can be used as a weapon. As you say that is a possibility but not a likely event. I cannot accept that as an argument for not having other measures, as it ignores the fact that there are other scenarios that the security measures aim to mitigate.
signed,
Director of the Ministry of Obfuscation and Bull!!!!
PS. Who knows what psychological damage can be wrought by crazed nail-clipper armed aircrew? "As you say that is a possibility but not a likely event."