Because additionally, with how easy it is to start any type of company, and it's only going to get easier, the differentiator between starting a company and having a brand is the personality. It's the feeling that you're going to provide your customers when they get into the store.
And to provide a feeling, you need to have a personality. So every company, every brand is going to need to develop a brand personality and make sure that it's consistent and clearly demonstrated and communicated and felt across retail locations.
It doesn't have to be flagship stores everywhere, but across all locations, there's going to need to have some sense of personality in order to differentiate so that your brand is always top of mind when shoppers are interested in your products.