I used to believe that starting people out on Irons is the best way to do things. After all, that was how I learned how to shoot.
BUT........ Advances in optics allow the shooter to hit targets more efficiently. It reduces the stress of not being able to hit a target initially. It encourages newbies to get into the sport. They can also focus on safe gun handling, habits and manual of arms , instead of focusing on other important things that make a good rifleman ( Breathing, trigger control and sight picture)
After they learn all this... You simply take out the optics and let them use the Irons. At this point, all the other essentials have already been learned. You can now work on skills to become a true rifleman that has mastered the art of Iron sights.
*Slow Clap* *Slow clap*