The OP suggesting rural living is entirely to blame is a strawman and absurd, and was presented with no evidence that removing all rural areas would fix any problem.
Sometimes population density is the defining concern,
in other cases it is geographic isolation. Small population
size typically characterizes a rural place, but how small is
rural? Population thresholds used to differentiate rural and
urban communities range from 2,500 up to 50,000, depending on
the definition.
So yeah 88,000 people could be rural if your primary factor is population density.