The question asks why Balgobin Bhagat's daily routine was a cause of astonishment. Based on the provided text, the astonishment primarily stems from the stark contrast between his external appearance and his actual lifestyle. He dressed like a sadhu (wearing a langoti, kanfati topi, chandan, and mala) but lived the life of a complete householder with a family, house, and farming. Furthermore, his evening routine of 'Sanjha' involving devotional singing and dancing, and his remarkably composed, spiritual reaction to his son's death (lighting a lamp and offering flowers instead of wailing) deeply surprised the people.