As I type this, I am wearing a G19 with Trijicon sights. I have started dipping my toe into red dots and will carry one some of be time at some point. Right now I have other priorities.
To say that someone is gun Amish without a red dot reveals a very narrow range of experience. For example, consider:
Carrying a gun in business casual attire in 90 degree temperatures.
A lady trying to find a place to put a gun in form-fitting clothing.
Carrying a gun when circumstances dictate carrying a gun in a holster that is not optimized for dot carry, for example, a shoulder holster. Accommodating a dot would require different strap placement which could potentially compromise concealment if not very carefully thought out.
The first of these three applies to me every summer. I will always carry iron sights at least part of the time.