I mean, yes it's kind of crazy they don't know about No Doubt, but it's entirely possible, especially for someone their age.
Not all of you acting like music snobs to the kids a few years younger than you when people 5-10 years older than us say the same damn thing about us regarding other bands
They're more familiar with Gwen Stefani than No Doubt. If you search twitter or ignorant comments, you will find them. Just my two cents