Your second statement here is flat-out wrong, and the "extreme training" is a product of that wrongheaded thinking.
Consider this message I've posted a number of times in recent months here on FR:
THE ROLE OF POLICE IN A FREE NATION
This idea that Americans have come to take for granted -- that we need police officers "to serve and protect" us -- has no place in a free nation. This country was built by people who were perfectly capable of PROTECTING THEMSELVES.
The purpose of "law enforcement" isn't to protect the citizens at large. It's to ensure that accused criminals are apprehended and protected so they can be subject to legitimate trials instead of hunted down and given "justice" by armed vigilantes.
We -- including conservatives -- have forgotten this fundamental aspect of the U.S. legal system over the years. As a result, we no longer think of the police as law enforcement officers and instead see them as nothing more than armed security guards doing a job that we are too lazy and irresponsible to do ourselves.
Police are revenue generators for cities and states.