Getting the hammer all the way down is riskier than lowering it to half-cock.
Once the hammer is released and lowered slightly, release the trigger and the hammer cannot go past half-cock, and even if it did the firing-pin lock is engaged so the primer can't be detonated. If you hold the trigger back long enough to get you past the half-cock, the process is much more hazardous, as evidenced by the stories of CZ NDs at combat games requiring the hammer to be fully lowered at the outset.
It can be done, but practice with an unloaded gun until you are comfortable, then practice some more.