Isn't it way more narrow than what you're saying? For New Mexico's cases it only applies to civil rights violations. If the police officer just for example kills someone in the line of duty, he still has qualified immunity

Civil Rights law is how these sorts of things are enforced by individuals who were harmed, in your example a Law Enforcement Officer violated someone's civil rights by killing them in the line of duty and their family can sue for violation of the deceased's civil right to life. Qualified Immunity short-circuits that entire process for the individual LEO's (it does not protect the organization, just individual officers).

If the prosecutor thinks they can get a criminal conviction for murder (or whatever) that is a totally separate process that is between the People (whom the prosecutor represents) and the defendant (in this case, the LEO who killed the guy in the line of duty). Qualified Immunity never applied to criminal cases(1). But criminal cases will not provide any money or anything like that to the victim (or their family)- that comes from civil suits alleging that the LEO violated someone's civil rights. And that is what removing Qualified Immunity encourages, individuals who were harmed can sue individual officers and receive payments from those individual officers (Colorado's police reform bill holds individual officers responsible with their own money up to certain limits where the organization becomes responsible; I don't know about other states).

1: Which are rare against LEO's because prosecutor's don't want to anger the LEO's that they work with regularly. This is why civil suits are generally the main avenue for people to get justice from over-zealous LEO's.