According to Osho, watching tendencies becomes repression when it is done with a hidden agenda to get rid of them—prejudging them as bad and standing as a partisan. True witnessing is dispassionate, neutral, and conclusion-free; you simply see, without deciding beforehand. From such choiceless observation, understanding flowers and freedom from tendencies happens by itself, as a natural consequence, not as a forced outcome.
If you watch your habits just to make them go away, you’re fighting them; instead, look calmly without judging, and they loosen on their own.