I think you are wrong. It is a very popular thing right now. I know that my city only has 2 places and they are packed all the time, even with them being in an area that is not the demographic. People drive from one end of the city to get their fix. I think this is either a love it or leave it thing, but many really do love it. Just the fact that your city can support over 100 of these shops is telling. And not just Asians. My family is lactose intolerant and so the ice cream shops do nothing for us. There are many that are like us. Plus, as I said, you can get ice cream everywhere else on property. Boba tea also has the benefit of being very insta-worthy. As much as I think that is silly, you can't deny that it is popular right now.