I've shot irons since I began shooting and carry only with irons.
I am not a fan of tacticool doo-dads and the like. To each their own.
The glass can break, the batteries can fail, and if all people train with is an RDS, they may be lost if and when it fails.
Lastly, at a realistic shooting distance, RDS doesn't seem useful, to me. I don't go through my life as if I'm playing call of duty, so YMMV. Ha.
If you buy quality American RDS, all your arguments are defeated.
I've seen one window pop out in a class (first gen Trijicon) but he used his suppressor height sights the rest of the class and shipped the RDS sight out on Monday had it back one week later (mind you we are in MI. 20 miles from Trijicon, so others times might be different by location).
My gun now has a type 2 (second gen) RDS, I change the battery once a year and since I started with it in 2015, it has never had a dead battery. I've never seen a 2032 battery corrode so I'm not sure if that is possible but changing it once a year most likely prevents that also. It is on 24/7 unless I turn it off. I run two mags through it every training session with it off to keep my brain fresh on the antique sights.
Now the cheap Chinese sights guys buy, I see fail pretty often (at least half a dozen per year) in classes or competition.
Change takes commitment, RDS is not learned by picking one up and you're an expert. It took me about 1k draw strokes before the dot automatically appeared, then about another 1k rounds to get everything just right for carry purposes. Now I shoot much better using the RDS as do everyone else that put effort into learning it (except those with eye issues like astigmatism).
Just a couple months ago a citizen took out a terrorist inside a mall in Indiana that was intent on killing as many people as he could, from if I recall correctly 40 yards.
I can list dozens of citizen SD shootings that were more than the 2 shot 2 foot thing people always parrot.
Had the guy in Indiana only practiced at two feet because he didn't live his life like call of duty, there would have been many dead people that day (that guy didn't have an RDS, my point was the SD distance that you can not absolutely guarantee you will never be faced with).
When people parrot the garbage they read online while never trying to learn something first, it is a major disservice to the shooting community.
Color TV's were hated, toasters were hated, computers were hated, etc, etc, etc by those that refused to try them.
BTW: centerfire semi auto"s were referred to as tactical doo-dads by my grandfathers generation and look at where we are now.