The red dot optics are really, really helpful. I'm rusty shooting open sights after 4 years of bullseye with red dots. I still enjoy shooting open sights and I have to show others how to do it, but a red dot helps when trying to shoot small groups at 50 yards and more.
I've tried open sights at 100 yards and the limitation is definitely how well I can duplicate the sight picture and hold between shots. I've shot 3-1/4" at 100 yards with a red dot on a P-09, but usually 4-6" group size, and about double that with the open sights. On a good day.
These late model automated CNC manufactured, reasonably priced pistols from CZ (and maybe others) are phenomenal. Human eyes and muscle control and mental discipline are the areas where improvements can always be made, day to day, year to year.
Joe