If we want to break a chain, then we have to break it at its weakest point. Similarly, to remove the curtain of offenses in Harinam, we have to remove them with the help of the offenseless, forgiving and liberal Nitainam first. Then Harinam will dance on our tongues with its full Nam-Rupa-Guna-Lila splendor.
It is impossible to mechanically do any sadhana for a long time daily, unless we get spontaneous blissful remembrance while doing it. So that should be our goal. Due to the forgiving and offenseless nature of Nitainam, Nitai Gunjan is one such sadhana, which makes even the most offensive person experience infinite bliss and love from the beginning to the end, while doing it.