Are we talking about the same US? I don't live there anymore, but I'm always surprised by the high number of indoor fountains in publicly-accessible buildings (as well as many parks and outdoor locations) there. For instance, every library, shopping mall, or larger store seems to have one near the bathrooms.
Meanwhile, in some European countries, for instance, outdoor fountains can be more plentiful which is fantastic in its own way, and indoor options are much less common. In others, neither outdoor nor indoor options exist so one is forced to find a public bathroom to use the faucet.
In some other countries, both public bathrooms and water fountains can be very rare, which unfortunately leaves no viable option.
Meanwhile, in some European countries, for instance, outdoor fountains can be more plentiful which is fantastic in its own way, and indoor options are much less common. In others, neither outdoor nor indoor options exist so one is forced to find a public bathroom to use the faucet.
In some other countries, both public bathrooms and water fountains can be very rare, which unfortunately leaves no viable option.