Who knows why it happens. The point being that in poorer neighbourhoods it very likely will, and many of the "just bill for it" approaches simply compound the underlying poverty problem.

Much the same way as such neighbourhoods are already food and retail deserts either because direct risks of operation are too high, or because insurers and/or banks won't back or support ventures there.

Paul Baran, co-inventer of packet-switched networking, wrote about the underlying problem in the 1960s:

https://www.rand.org/pubs/papers/P3780.html (footnote, p. 7)