Any shotgun shooter will tell you that you can do well with just a bead sight on the front of those guns.
Don't make the mistake of equating a shotgun with a rifle. Sure, they're both guns, but the manual of operation is completely different. This is not about shotguns so I'll stop here.
I hear what you're saying, but sometimes we don't know what we don't know. And once we learn something it becomes useful.
Some will say that the phrase "we don't know what we don't know" is redundant or obvious, it's not. It speaks toward willful ignorance. We get a thing and rather than learn about it, we're generally too lazy to read the manual and just go off and strat using it, wrong. How many of you actually read the manual your car came with cover to cover? I do, but I'm a geek and not normal.
There is so much to shooting a rifle accurately it's amazing. It's a hobby unto itself. Most won't take the time to understand what MOA means or how the trajectory affects their shot. Most don't realize that there are two zero yardages. Most think that trigger control is keeping the trigger in the gun.
Each tool is different and has a specific purpose. The AR is a battle rifle, but the vast majority of them are purchased just to have fun at the range. So the whole concept of being able to pick up any gun to defend themselves is completely foreign to them.
Therefore, if a person wants to get a red dot because it's easier, fine. Sure I'd love to have everyone here become and expert in different guns and sighting systems; that's not going to happen.
I'm more interested in promoting the sport of shooting. If a person is more likely to get into it by having a red dot or magnified optic, I say go for it. Using a red dot first won't make a person a bad shooter. They can always learn irons at a later date.
You don't need to learn a stick shift first. It won't make a person a better driver. It's just another skill set that's valuable and opens them to a wider variety of possibilities.
In any group of enthusiasts we tend to eat our own. We see someone who's starting out, but not doing it the way we learned and we tell them it's wrong. I've seen guys light up new shooters over stuff that really doesn't matter.
So, if someone wants to throw a red dot on their rifle the day they buy it, I'm not going to stop them. If they want to change the barrel before they've ever shot it, I'll question that. When talking about guns, if the bullet/projectile/ejecta mass is hitting the intended target, nothing else matters.
Let's get them to the range first. Let's see that smile when they hit the target. Then we can work on decreasing the size of their groups or the value of being able to use any sighting system.