I use to believe that as well, but even in the military we have discovered that single plane sighting (red-dot in the Army's case) is significantly faster than traditional ghost rings in close combat. They are also more accurate at extended ranges. And of course they are significantly quicker yet than traditional three point alignment systems. And as you might imagine, Fort Benning accumulated years of testing and combat data before reaching that conclusion.
Could see where the red dot sites would be faster, kind of best of both worlds really....don't own one but with so many saying how good they are, and like you said the military uses them a lot, I'm going to lean towards your all's assessments. I like open sites for short range shooting and my eye sight is good enough that I can still do so....longer stuff though, scope is always going to be better. Might have to pick up one of the red dots and see how it works for me....sounds like it might a better option...sometimes I'm too old school and comfortable with what I've always used, which is weird since I'm a techy