Bhagawan Nama Bodhendra Saraswati Swamigal in Nãma Siddhanta says that he conducted an enquiry into "Why people did not take to Rama Nãma, which was so easy and simple to chant?"
He puts forth his findings in the following words, "Since it is so easy and simple, none takes to it!"
The reason for this is that everyone desires to do something 'grand' even though none possesses the aptitude. Everybody is aware of his shortcomings yet one desire to proudly declare that he is doing dhyãna, yoga, etc. But the truth is all these people are only deceiving themselves. In present age these paths do not suit us.
Well! What about the 'Nãma' (Name of the Lord) that you advocate? Nãma chanting will ultimately take you to the same goal that Self enquiry (Vedanta vichhãra) or Yoga or 'Karmãnushtãna' takes one to. Through Chanting the Divine Name one can attain the highest state.
The Ãzhwãrs, the Nãyanmãrs, Thiagarãja Swami, Pãnduranga Bhaktas, Chaitanya Mahaprabhu have all shown that one CAN attain liberation through mere chanting of Nãma. Even today we find Sãdhus who have attained the highest state through mere chanting of Nãma.
This is the glory of 'Nãma Sankirtana' -- An absolutely easy, simple path.