Your character isn't a detective. With that said, you are rewarded for exploring and going through people's stuff with EXP and possible other secrets like passcodes. There's no single right way to go through missions, you can be sneaky like me or run in guns blazing. Multiple points of entry are also fun.
However Simon discovered nothing and crouched even while walking down an empty hallway. Even if exploring every nook and cranny pays off, it's not fun to watch... only redeeming factor was him discovering two identical bulletin boards right next to each other.