The problems with Kahrs, when they occur, tend to be quite minor....and can be fixed with a tiny bit of tweaking. Many people find the concept of "tweaking" a pistol objectionable, let alone the concept of a break-in period. I have never approached things this way, especially regarding a $400 gun. If the Kahrs ran $1000, then I would be much more picky myself. But, they are reasonably priced - so I give a bit of latitude.
Whether one is tolerant of minor issues (and required break-in) or not, is a individual thing. Neither side is "wrong". It is just a matter of personal preference.
With the CM9, with which I am intimately familiar, the issues virtually always center around only two things: 1) smooth feeding from the magazine, especially from a FULL magazine....and 2) magazine followers. Both of these items can be addressed EASILY, provided one understands the causative issues behind the problems....and has a modicum of mechanical aptitude. It seems that many do NOT.
If one has no mechanical aptitude, doesn't understand the ins and outs of these kinds of problems with such a small pistol.... and expects perfection right out of the box, then perhaps the Kahr pistols are not for you. Doesn't mean anyone is wrong or bad for being that way - not at all. Just "different strokes", as they say.
As others have probably already said, the smaller the pistol, the greater the likelihood of feeding issues. Really small 45 ACP pistols are a classic case of this. Not much linear distance available to feed those fat, squat 45's....vs. a full size pistol, such as a 5" 1911. 9mm's tend to not be so bad, as the round is pretty small anyway.
For myself, I have never found the Kahr "problems" daunting. When I got my first CM9 (bought new), I simply made a study of the way it worked and the possible issues. I did, in fact have mag feed issues, especially from a full magazine. It literally took me 20 minutes to figure out what to do about it. After that and with a suitable amount of break-in - NO problems. Now that I have a second CM9 (I sold the first one but always regretted it - so I finally got another)....I have experienced the same minor mag issue, even though this CM9 is used (and partially broken in). I applied the same "fixes" (all of about 10 minutes work). Now, the gun runs perfectly - I have put more than 500 rounds through it, with ZERO problems.
My advice to the new Kahr owner is always the same. Forget the hype and the blathering of those who've never had one and talk to someone who has experience with them. Then, follow the suggested protocols and 99 % of the time, you'll have no problems.