Compare this to a simple foldable electric scooter. It allows you get to places much faster, and has similar attributes in terms of things you do outside of commuting, is way cheaper and more reliable.
For the hyper-optimization of walking in crowded places at a slightly elevated pace, you basically have to convince someone that spending x amount of money instead of leaving x minutes earlier is worth it, and that x has to be in the range of play money for an average person, because the latter is free.
In general, if you are pushing a product that isn't relying on lifestyle marketing, or isn't radical new technology, the product needs to be an optimization on something existing, and when considering what it optimizes, you need to look at an entire picture, not just the particular item.