>What are "unreasonable searches" if not being under "indiscriminate mass surveillance?"

A police officer randomly entering your house and going through all of your belongings.

Indiscriminately searching a larger number of people is not necessarily unreasonable. Take for example the TSA at airports where you have to searched to enter and the airpots have a ton of cameras recording every single person there.

Frankly, the TSAs security theater should not be taken as an example of reasonable gov behaviour.