I always wondered about airport security... Like why is passengers considered so much, and not well absolutely everything else on the big modern airports. All t

I always wondered about airport security... Like why is passengers considered so much, and not well absolutely everything else on the big modern airports. All the shops, restaurants, coffee shops and so on... Surely some of them have kitchens and kitchen knifes? Like proper big ones... Or lot of liquids... Or solid objects...