While the subway would have been a nice addition to Cincinnati, it shouldn’t be forgotten that at the time, Cincinnati already had a working (and popular) above-ground streetcar. Some of these lines were originally cable car! So, it isn’t that the city completely neglected public transportation, but just didn’t complete the subway portion (in 1925).
Sadly, the streetcar was eventually dismantled (1952), so you can still lament the lack of public transportation.
I live near one of the old streetcar stops, and it would be great to still have that kind of access to downtown.
https://en.m.wikipedia.org/wiki/Cincinnati_Street_Railway
https://www.wcpo.com/longform/a-city-built-by-streetcars-a-l...