They could! However, in practice. you find the same chain shops selling the same products: their products and decor all determined at a corporate level. That in turn makes every street in every town look the same. It is what sells best and what people buy that determines what is stocked. My point is that if people really want it to change then they need to show it with their spending. It is no good complaining about it while secretly really liking it.We have to remember as well that however 'nice' local shops might be, the fact remains that big companies can be cheaper and more diverse, while the internet even more so. All hail the internet
The problem is that even the chains are leaving the High Street now. I think we will regret that. IMHO even if you go into a shop, try out the product, then order it online and have it delivered, we still need that local High Street presence, but I cannot stop the tide turning.