I had a RDS on my carry gun, but found I was faster in self defense ranges upto 15yds with open sights.
Past that the dot took over for speed and accuracy in my case.
So since the overwhelming majority of self defense shootings occur under 10yds I just took the RDS off my edc.
I bought a dagger that I plan to mount an RDS on, and use it as a learning pistol. Once I learn to use the RDS as well as iron sights under 10yds I'm going to mount one back onto my edc.
On my 44mag revolver I put one on because you can actually see the sight once it starts getting darker when doing the evening hunt or early morning when it's still not quite bright enough to make my iron sights visible.
Accurate shots in the dark sounds like a great reason for red dot.