Peace Paul (Reverend Ananda of the Amida Order) writes:
If you have an interest in Buddhism, then you have some sort of karmic connection with the Buddha. Those who do not have such a karmic connection, simply will not encounter the Buddha or the teachings of the Buddha.
Even individuals who have a strong karmic connection with the Buddha Dharma may not become practitioners. They may instead be in a situation where they are near the Dharma. They may live close to a Buddhist temple. Perhaps they have a relative or spouse who is a practitioners, or maybe they have met Buddhists teachers or read Buddhist books.