Magical thinking! You cannot predict when or where you will become a victim of violent crime. To think otherwise is not logical.
I can appreciate if someone decides not carry because they are willing to take the risk. But to say that today will be a safe day because of a particular location and/or time so a weapon is not needed is pure fantasy.
I know a few that carry occasionally too. I don't get it.
I wish I could "feel" whether or not I needed to carry a gun because I wouldn't go there.
I think some of these folks suffer from a lack of confidence in their ability to protect themselves with a firearm. Or overconfidence in thinking they will never need to protect themselves.
Vince Lombardi said "Winning isn't a sometime thing; it's an all the time thing. You don't win once in a while, you don't do things right once in a while, you do them right all the time. Winning is a habit. Unfortunately so is losing."
His quote illustrates the need for mental preparation and a total commitment to doing things the right way.
IMO, "guessing" whether today's the day you need to carry a gun is unrealistic. It shows a lack of understanding as to why we bother to buy a gun, get a permit, train and practice, because we simply refuse to be victims. We cannot pick and choose the time or circumstance when the need may arise to protect ourselves and more importantly our loved one's.
Concealed carry is truly an art which must be taken seriously with complete and total commitment to doing it right.
But again, just my opinion. Others are free to do as they wish.