I can't really comment on how much is a sufficient amount of training for law enforcement, cuz fuck if I know. There's certainly no shortage of problems from cops, but is the root of that problem their training? I suspect it has more to do with the quality of applicant / screening in the hiring process. There are a handful of kinds of people who'd be interested in a career in law enforcement, and most of those are the kind of person who shouldn't be trusted with ANY authority.
You can't train someone out of being a shitty person.
Tbh the column on the left is the one that elicits more of a 'seriously?' from me. Why in the everliving FUCK would I need more than a couple youtube videos worth of insight + a cert showing you understand how and why to clean sharp shit between clients to give hair cutting or nail painting a shot? Result might not be pretty right out the gate; but legally speaking, who cares? Price it low until your skills increase.
You might not be able to train the shitty out of a turd, but you can raise the cost of entry and weed out some dingleberries. If the required effort is higher and the time commitment greater, it might deter some folks.
You can't train the shitty out of someone? You can have them supervised for a lot longer and if they have the pattern they fail. That is the exact purpose of pointing out the difference.