Crime and cost of living in your area.

Post Office is not easy to get into. Most posted "jobs" are temporary (may become permanent if lucky) Part Time (casual) using one's own vehicle perhaps, or seasonal. Highly politicized, especially in a region such as borderland (El Paso County) or all of new mexico. Yes it may be "easier" elsewhere. The Exams seem to have a degree of "trickery" in them, did take two in mid 00's when there were a handful of FT positions opened up in this area (las Cruces NM). Hundreds of Applicants, many with a full Military retirement, for a handful of jobs.
I’ve applied to USPS several times in my life, never even a call back.