I have to admit that I'm not one to spend a lot on a red dot optic and I've never had one that I own fail... yet.
I do believe that you're overly optimistic about battery life in my experience, but that may be my fault for not spending half again the cost of the firearm on one.
But do you think a red dot will fail as regularly as even a very reliable semi-automatic pistol.
I'm the stubborn old dinosaur that carries a revolver religiously even though I have a couple dozen semi-automatics to choose for carry.
Being that stubborn old dinosaur, I can't even comprehend attempting to conceal carry any hand gun with a red dot attached.
A laser maybe, but not a red dot.
Lasers IMO are another can of worms...
They are a fun toy and can be a useful tool, but should never be the sighting means of choice (dependence) for a conceal carry weapon.
I've personally witnessed the result of that dependence in its absence with more than one shooter and it's debilitating for them.
That would hold true for a red dot if you could successfully manage one on a carry weapon.
That may be where you and I have a disconnect on this.
Mine is a perspective of carrying for personal protection, but I'm not sure if you're carrying with a red dot or simply using one as a range toy.
POI doesn't have to be spectacular, just consistently repeatable and if you shoot pretty well with irons then I don't understand why you would put a red dot on a carry weapon if that is in fact what you're doing.
I can completely understand why manufacturers wouldn't pigeon hole purchasers by doing so for all of the reasons mentioned in this thread.