All of the guns I carry (Usually an EMP or P938 and a P238) have a safety in addition to the trigger. Drawing the weapon to fire I instinctively flip off the safety. Before re holstering the safety gets put back on. Not as much to worry about inadvertently reholstering without looking. Not having a safety in addition to what I find to be the horrendously long trigger pull inherent to most DA only pistols is just another reason why I will never have a DA only pistol.
IMHO if you can't reholster anything without looking, you are carrying wrong or just plain not practicing enough.