You chose me instead of the first person who was articulating this better than I could, and he responded to you first. Do not mistake me as the easier person to argue with, because you will not get that at all.
Your counter is the exact opposite of superfluous, and quite quixotic. I personally know two persons in two different career fields who had to flip up a rear BUIS and use irons to stay in the fight. One was a Marine who's primary was obstructed with debris from an IED, the other was a cop part of a warrant team who in the middle of a stack, his optic died. Both were clear demonstrations that while technology is awesome, it's still not impervious to being infallible either. And both were still able to stay in the fight which translates to this well in a life lesson that if things stop working with your plan that has no backups, then you still have no backup and screwed yourself whereas a backup in place is a backup well thought out.
I am not going to argue with you. Sorry, but I'm not here to argue.
Did I or did not I mention planning for failures?
The issue under discussion was on the relative need or effectiveness of lights on a handgun.
I happen to use iron sight rather than electronic optics.
And I can assure you that I'm unlikely to be a marine or on a warrant team.
I'm talking about home defense. I'm talking about MY home defense.
I have tried to point out what I chose to do and provide my reasoning.
As I said, I have tried to build in the capabilities to respond to home self defense, and in multiple layers.
I have pre-planned exit routes if I have to evacuate and honestly that's a far more likely threat than home invasion.
I have a stock pile of food and water and medicines to cover shorter term scarcity and both UPS (Uninterruptible Power Supplies) for short term electrical interruptions on mission critical devices and a whole house generator (had to really scrounge and scruff and suffer for a couple years to add that layer) for longer term interruptions (we've had several of those so far and in those cases my front porch looked like a Geek Squad basement with cell phones and laptops charging off the power strips I put out for the neighbors).
I have no intention of ever trying to prevent theft or looting.
The only real difference I can see so far is that I can't see any reason for putting a light on any of my handguns.