The Illusion of Your Control
Many office thermostats and pedestrian buttons are actually fake. These placebo controls do nothing, but they help people feel calmer and more satisfied by providing the illusion of personal influence.
Designers often install these non-functional buttons to prevent people from feeling helpless in automated environments. By pressing a button and seeing a light, you gain a sense of agency that effectively reduces stress. This psychological hack is surprisingly common in modern life. It turns out that believing you are in charge is often just as comforting as actually being in charge.
Source: Placebo button