If you want cops to be better at that, you have to invest in them more. Training takes time, time is money, etc. I know a cop who I believe to this day never drew a gun (and is now an instructor for my county), but he took the time out of his own interest to do MMA etc. He had multiple people try and fight him when being placed under arrest, and he subdued/cuffed them by hand - no guns, tasers, etc. He's an extreme outlier. I'm sure he got some discount to learn all the different fighting styles he went through, but he did it all on his own time, out of pocket. I know some cops have crazy overtime, but in his scenario he is by no means making good money (or at least wasn't then). Advanced fighting classes are, for many people here, a luxury that only well-off people with high paying white collar jobs can afford. Generally nobody is in it as a career.