I'm not sure Bellevue or Moscow are that walkable. A walkable city is not just one where you can walk from A to B but where doing so is easy.
For instance, think about downtown Barcelona. You can go to a bakery one block away on foot, then to the supermarket on the way back, and have easy access to tram/bus/metro/bike in every other case. Sure, you often want to use the car, but for most cases it's not needed.
Within the US, maybe NY and parts of DC/Boston fit this... otherwise the lack of density makes it too inconvenient.
Bellevue WA downtown in particular is not ideal, but walkable. The only place I couldn't walk to was climbing gym, and also there's a big transit hub in the middle.
Moscow is very walkable, even in most outer "apartment block suburbs" you can do anything within 2-7min walk. Plus it has frictionless subway 5am-1:30am or so - not like in NYC; on major lines train intervals are/used to be less than 1 minute at rush hour, and 7-8mins at 1am - so, you never even need to plan, you just go. Things tend to cluster around stations so city map becomes kinda like a 4x galaxy map of stuff. Walkability tends to decrease 10-20mins away from subway stations on foot, with more industrial areas and such, although basics like groceries and some cafes would still be there.
Based on touristic experience in Europe (Germany, Spain although not Barcelona, Italy, England, etc.) it's about as walkable, across most of the city, for daily needs as European city centers.
But why would I want to walk with X groceries for 5mins (potentially in the cold, heat, rain, ...), when I could drive for 15mins in comfort and get 5X groceries in one trip? Why would I take frictionless subway to a stadium for a concert when in a car centric city traffic allows one to just uber? Why would I walk to a whatever local X is available when I can drive to the best X in a large area in the same time? Or for more specialized hobbies, e.g. climbing gyms or large swimming pools, of which there may be 1-10 per city, and 1-2 good ones, why would I plan to live near one or endure transit when I could be much more flexible if I drive to one in a car friendly city? Etc.
For instance, think about downtown Barcelona. You can go to a bakery one block away on foot, then to the supermarket on the way back, and have easy access to tram/bus/metro/bike in every other case. Sure, you often want to use the car, but for most cases it's not needed.
Within the US, maybe NY and parts of DC/Boston fit this... otherwise the lack of density makes it too inconvenient.