Shadowrun had some REALLY good shit in the sourcebooks.
There was a discussion about how one runner's boyfriend couldn't get it up unless they had a neon sign of a corp after they got slightly burnt slicing a database.
Another one where just the sound of a door slamming would lock up a former runner who got 'adjusted' to never touch firearms again.
The thing about this new setting, is they don't think through their shit at all. They just go "This will protect my fantasy kingdom... hee hee hee."
That bit about no city guard? The PC's are going to rawfulstomp the fucking place.
"Oh, there's these guards..." and you know the statblocks will be trash that any halfway competent player could tank the whole squad by themselves.
It's like when you bought a module in 2E and you saw the primary temple guards wore chainmail and were 2nd level fighters. Apparently the church can't afford platemail and they don't have any head stompers left over from the last crusade.
The head stompers may have been promoted, retired, or moved on. Levels beyond 3-4 weren't super common even in the old systems.
Here's a good check on that: pull up the old 2E PHB, and check to see what fighters get as followers at 9th level.
The main leader (henchman?) could range from level 5-7, with a small assortment of magical gear (example: 5th level fighter, platemail, shield, and battle axe +2, or a 6th level fighter with platemail, a shield +1, spear +1, and dagger =1).
Troops could be infantry and/or cavalry, but were always 0th-level (example: 20 cavalry with ring mail, shield, 3 javelins, long sword, and handaxe; plus 100 infantry with scale mail, a polearm, and a club).
Elite troops were usually 1st-2nd level, but ranged from mounted knights (1st level fighters on heavy war horses with all the toys) to berserkers, to elven fighter/mages. But you weren't getting more than 10-20 of these depending on option.
The deterrence posed by a town guard is via sheer numbers, plus whatever elite units or NPCs might show up to discourage bullshit. It should be noted that other adventurers who act to stifle bad actors might get 'favored treatment' at a minimum -- and those that put their asses on the line might wind up with titles.
The whole concept in general is basically a shitty knockoff of Sigil, and Planescape's designers should feel personally insulted at this crap.