Why do I need a Tribe?

I met a woman today who told me she still breastfeeds her 22 month old overnight (and during the day). She lives around the corner from me. I know plenty of woman who have done that, so why did she make more of an impact? Because I just happened to meet her in the park, I didn't meet her at an attachment or natural parenting gathering. I actually doubt if she's heard of attachment parenting. She's just doing what she knows is right. I didn't realise until today's chance conversation in the park how much I still look for outside validation.