Hiya Metal wonder nine guy and thx for the thread. I hope the issue did not affect your purchase of said cz75. And not an expert on the subject of advantages or disadvantages of keeping half cocked.Dont get confused by it tho. But my cz long slide,97b,tactical sport,and checkmate all in half cock allow the manual safety to be thumbed up and prevent trigger pull,but all have competition hammers. Its a moot point on my cz's with decocker of course. If I every had such a concern on the spot,i.e.. gun show and considering buying. I'd google cajun,czc,or cz-usa and talk to a smith for my answer. My guess as to why the manual can't help you,is that the basic starting position is to choose hammer up or down. Maybe where,don't go off half cocked originated from lol.Be well.