Why do some women not help out other women?

I was in a target bathroom and there was a young girl who had her period. She asked a few women if they had a feminine product? Or change for the tampon machine? And they said no!

I was in a bathroom another time and a young mother was changing a diaper. She had no diapers on her. There was a mom with a diaper bag. She finished her business and didn’t offer a couple fresh diapers.

I’m only 16 with no kids so I couldn’t help with diapers but I helped out the other girl with a tampon. What’s wrong with other women? We need to support each other!