That's true and I can't make excuses for some agencies who refuse to change. I won't name agencies, but there are a few that I try to steer people interested in policing away from, because they are still stuck in the 1970's mentality. I've seen good people go to these agencies and become someone I can't respect. They are forever tainted because other agencies won't take them for employees.
I personally think it comes down to who the agencies hire. I've been a cop for nearly 20 years and I've always advocated for a well-rounded person to be hired. The ideal candidate would be college educated, spent time in the military, is married and is in their late 20's or 30's. These factors cover most of the gamut in terms of what pieces make a good officer. Common sense, down to earth, smart, even tempered, negotiable, doesn't take themselves too seriously aren't skills that can be taught in the police academy; they come from life and life's experiences.
The larger agencies can't hire people with these qualities in the quantity they need. The smaller agencies with one or two openings at a time can be more selective with their hiring decisions. When you hire 40-80 people at at time and have court mandated hiring priorities, you don't get the same quality of officer as the smaller agencies and then you put that new, impressionable officer with the old guard who teach policing from an archiac, agency specific point of view...you see the problem.
During the years I was stationed in Germany in the Army, I got to see their national police up close (sometimes, too up close. I was young.) and for them, there is only one agency and you get assigned to a specific city, but were trained the same as the guy in the next city. When promotions come, there is advancement across the country, but you still work for the same agency. England is similar. What would happen if we did something like that here? Not that it would as no one would be willing to give their power, their police agency, their control. But seriously, for the sake of argument, what would happen? Would it be beneficial or not? Something to think on.