What did Sosanko mean when he said that Patol Babu was lucky?

Patol Babu was disheartened because he didn’t get to even speak properly in the movie. Sosanko tried to console him by saying that at least he got a chance to speak a single word in the movie where a hundreds of people appeared in a Baren Mullick film without having anything to say. Moreover, the lead actor Chanchal Kumar also had no lines to speak. So, it was a once in a lifetime chance for Patol Babu.