To say that one enters the stream of sadhana through work only is to say too much. One can enter it through meditation or bhakti also, but work is necessary to get into full stream and not drift away to one side and go circling there. Of course all work helps provided it is done in the right spirit.
Why argue from your personal experience great or little and turn it into a generalisation? A great many people (the majority perhaps) find it [sadhana through work] the easiest of all. Many find it easy to think of the Mother when working; but when they read or write, their mind goes off to the thing read or written and they forget everything else. I think that is the case with most. Physical work on the other hand can be done with the most external part of the mind, leaving the rest free to remember or to experience.
[Sri Aurobindo: Letters on Yoga]