We don’t have a magic box and haven’t developed special algorithms as is sometimes surmised in our social media feed. We offer different advice for the same reason why a heart surgeon would offer different advice from your trusted family doctor.
The heart surgeon has chosen to specialize in that field and therefore has seen a lot more situations that lead him/her to offer different advice. When you specialize in one field you have the luxury of really studying it and having a ton of experience finding creative solutions.