People in general are ignorant and addicted to fruitive activities. Without disturbing their minds, the karma-yogī can benefit them by explaining the truth about man's eternal position as Lord Kṛṣṇa's servant. Thus in the Bhagavad-gītā (3.26) Lord Kṛṣṇa instructs,
So as not to disrupt the minds of ignorant men attached to the fruitive results of prescribed duties, a learned person should not induce them to stop work. Rather, by working in the spirit of devotion, he should engage them in all sorts of activities (for the gradual development of Kṛṣṇa consciousness).
It is very difficult to convince those who adhere to fruitive activities that they should render devotional service to Lord Kṛṣṇa. The reason is that most fruitive workers are foolish, fallen and impious. Therefore all their activities are whimsical and motivated by evil. Their intelligence and expertise are thus utilized in defiance of the Supreme Lord. They are totally in the grip of the illusory potency, māyā, and so they imagine themselves to be the Supreme Lord Himself, or at least His biggest competitor, like the demon Śiṣupāla. They simply try to enjoy this material world in various ways. In fact, their hopes for enjoying this world are just make—believe, or māyā, and this make-believe yearning leaves them hopelessly cheated. Yet they cannot give up the hope to enjoy. And when they realize that fruitive activities are futile and are more or less forced to renounce them, then such renunciation becomes merely another illusory scheme for a greater enjoyment.