There's no "imagine" searching air crew and pilots, they are searched like all other staff at airports, in fact staff are subject to the same searches as passengers, they also have to pass police criminal checks and counter terrorism checks to gain their staff id. passes, we can all rest assured that pilots don't want to crash their planes and i'm sure they want all people travelling on their plane who they have responsibility for to be subjected to stringent security checks.
Some of the security checks might seem a bit pedantic, but they are based and instigated by the DfT on what they percieve as threats or loopholes that could be exploited, they then have to balance this against, on allowing us a reasonable level of freedom in moving around and being able to carry personal items which we need during our travels.
Personally i don't think that our security procedures are too lax in general and neither are they too restrictive, of course the odd item here or there can be missed like a deoderant but then when security personnel are checking thousands of passengers constantly and having to re-check scanned bags for prohibited items and endure the same blah-blah-blah comments they might make a mistake, perhaps some of the onus should also be put on passengers making sure they double check their hand luggage for prohibited items, this would make security checking more efficient and effective which benefits everyone.
Also most security crews do rotate every 20 mins to a different task of the total process , its not just the screening thats important.