As the baggage reclaim areas at many US airports are 'land side' restricting what can be carried in checked baggage would make no sense. Someone can just walk off the street, legally loaded to bear, and do their worse.
Putting baggage claim 'air side' would make no sense either as pax would have access to naughty things in their checked luggage.
Redesigning every US airport to put baggage claim between the two won't happen.