>There is no judge in the loop. You don’t have that independent authority to scrutinize the demand and to say whether or not it’s legitimate,

The 4th amendment does not require a judge in the loop to decide if a search is unreasonable. This type of thinking leads to adding bureaucracy making law enforcement less efficient. Criminals benefit from having law enforcement's throughput minimized so they will campaign at every turn to make the government less and less efficient and require more and more procedures for an investigation so it all comes to a halt that way as long as they aren't most wanted 1-10 for a year they can get away with what they are doing.