It doesn't, but it's also the only truly communal American holiday. Christmas creates a lot of good will amongst people, I know my union my Grandma represented adopted HUNDREDS of families for adopt-a-christmas every year. However Christmas is still about. But modern Christmas is still based in celebrating your family, not people as a whole. Adopting other families isn't essential for a Christmas celebration. Halloween is a day for children to walk around feeling cool in their costumes, get candy, and just have a good day. It's the one day of year Americans can actually knock on their neighbors door without it being weird. Even St. Patrick's day, the second most communal holiday in America, is entirely based around parades and not homes.

On one hand, I don't think Halloween would mean much to nations with closer communal ties. I get why other nations don't understand why America loves Halloween so much. On the other hand, Halloween's cultural significance of being the only inherently community building holiday in America makes it a more worthy holiday than many others. With how alienated people are becoming from each other, I think Halloween is a more important holiday in America than ever.