Wouldn't it be true that the passenger would have to go through security screening for an international to domestic connection in any country which requires going through customs at the first point of entry (since the passenger had to get his/her checked baggage for possible customs inspection)?

Some badly designed airports in the US require an international arriving passenger to go through security screening after clearing customs even if that is his/her final destination, because the only way out of the airport is through the screened area. Less convenient and less secure.