Don't we need some positive energy to live our life peacefully?
We are exposed to electromagnetic frequencies through our use of cell phones and Bluetooth devices.
Our day to day interactions with toxic people, who are manipulative & judgemental
Our own thoughts and beliefs can be just as toxic as the words and actions of others since they tend to play all day long in our heads, consciously or unconsciously.
It's essential for your overall being is detoxifyed to keep the energy field optimistic. Which can get contaminated by many such reasons.