Quote Originally Posted by sinister View Post
There are a lot of people (including trainers) who use an alternate back-up (maybe a smaller red dot) vice irons.

Many who choose not to use a back-up at all are not in the real-world gunfight business where the risk of an electro-optic failing means somebody (not the bad guy) could be shot, crippled, or killed.

Not an actuary or statistician, but there's always risk (which equals likelihood x consequences) -- why, over time, things like seatbelts, airbags, helmets, insurance, reserve parachutes, IFAKs and tourniquets, and/or a handgun might be considered prudent backstops. You don't need any of them -- but when you do you need it now.
I'm not in the real world gunfighting business, and hope I never have to be, but.....