Part of the reason we're fat as fuck is that giant parcels of land make driving everywhere mandatory.
https://img.ifunny.co/images/d542d2d7e1830ef76a29483dd498245...
I live in the countryside. In 2018 our small neighboring town of about 13k residents had their first murder since 1965, and none since. That works out to about 0.12 homicides per 100,000 residents annually. By comparison, Baltimore has 22 per 100,000 annually.
The murder thing is also an error of faulty generalization. As a counter example, Opelousas, Louisiana, a nothing town with barely more people than yours, has a murder rate of 39/100k, higher than your example of Baltimore, and much higher than New York (3.92/100k).