What if legitimate travelers entering the country were to bring the items in as part of their checked luggage? I feel like there's a whole untapped market here

What if legitimate travelers entering the country were to bring the items in as part of their checked luggage? I feel like there's a whole untapped market here where people could rent out X amount of space in their suitcases - with the obvious proviso that the item(s) would need to be completely opened (and maybe independently xrayed) first, to eliminate surprises.