If you're making sure the electricity, water, food is still available, you want to do your job, and so testing is what indicates to you, do you need to go into isolation and make sure you're not the source of spread.
Si sabes que la electricidad, el agua y la comida siguen disponibles, quieres hacer tu trabajo, y los tests te dicen si debes aislarte y asegurarte de que no eres una fuente de contagio.