You are right, but there is different contexts and different ways of approaching - Seduction is subtle and patient in my book, I want to get a vibe about the girl and how to best approach, not just a running around to 3 women in 1 hour collecting phone numbers and calling it Don Juan
You do not have time to come up with a game plan for each woman. The opportunity will be gone in a blink. Also, the longer you wait and think about it, the more likely approach anxiety will set in. I know this from personal experience. It isn't just theory.