I don't understand how some people say there's no way you could actually induce labor and the baby…

I don't understand how some people say there's no way you could actually induce labor and the baby would have too come on its own. But when some try things like pineapples it works for them instantly and they go into labor. yet everything they've tried it didn't work, but they tried the pineapple and it started labor for them. I believe the methods do work for some moms, not all.