SLF.
I happen to agree with you, but limiting the liquids carried on also keeps down the good old fashioned gasoline and a match that brought so many aircraft to Cuba, before the cubans finally started shipping the hijackers back to the USA....
The problem of blowing up the aircraft isn't as bad as them being taken over... but it is real. And it takes shockingly little to do it. (it was only a very few ounces that brought down pan am over lockerbie)
The explosives expert is think from scratch. Not doing most of the mixing before hand and only the finally step inflight, which is exactly how I saw it demonstrated... And an amount the size of a match head made a VERY impressive bang...
Cheers
Wino