In my experience, there’s more interest and curiosity about prayer than there are about other aspects of the life of faith. Compared to mysterious rituals or seemingly dusty dogmas, maybe it’s that prayer feels more accessible or personal. Maybe it’s that we all have moments where we just want to cry out at someone or say thank you to something bigger than ourselves.
Furthermore, prayer is an act that’s clearly not unique to the Christian faith. People of different religions from all over the world share this behavior of prayer, even if we direct our prayers to different deities. Even if we have other differences of understanding, Jews, Muslims, and Christians all pray to the God of Abraham. And for the people in our culture who identify as spiritual-but-not-religious, prayer may have special appeal.