That is the way we had birthday parties too, and they are the best. Invite the whole family not just the kid. Nobody HAS to drink, and I didn’t because hosting, but it’s more hospitable to have adult beverages available. Often a “fancy drinks” area for the kids too, with colorful non alcoholic drinks and garnishes for them to create their own drinks.
So, so much better than a house full of kids all the same age. Kids running around in packs, adults chilling.
I say it’s short for Chile con Carne because beans are the baseline chili - I’d eat chili with beans and no meat, Chile sin Carne, that’s a meal by itself.
But chili with meat and no beans, like Chile Colorado, needs to be served with beans and rice, it’s not good by itself. I do make that sometimes but people just call it “meat” when I do. Nobody here thinks of it as chili.
I don’t think any food is pure. Traditions are forever changing.