Ah, I got it now. It's boorish to state that there are, in fact, times when you might want magnification, in fairly common situations. Situations which thousands of people encounter often. I guess it would be less-boorish to say something like, "That is a far cry from being comfortable with hitting a suspect at 100 or 200 yards in failing light, that I have to be 100% sure is actually a threat." But then it becomes boorish when someone replies with "And what do you suspect them of doing at 100-200 yards in faing light? Wasn't talking need, nor want, but when we start talking utilize in the confines of action shooting you really can't effectively "use" lots of excess magnification. In the confines of failing light at 100-200 yards, if you don't have 100% certain facial recognition, taking such a shot would be highly suspect," and I reply answering the question. I'm not sure if this word means what you think it means.
You don't need to answer, but I'd be interested in just how many tactics you actually teach (and if you teach any, if you have actually done them), and if you have actually been contracted by any high-tempo agencies or teams? I know...answering would be boorish. I have absolutely no doubt that you are a highly accomplished shooter - no doubt better than I am. What I have not seen, anywhere, is actual real-world experience using those skills. If you have, then you know as well as I do, that shooting is only a piece of the equation. You also know that TTP's are in constant flux. And since you train these organizations (and have presumably actually done the things you teach, for real), you probably also realize that "seeing" is actually huge in disciplines outside of the narrow confines of competition. Depending on the type of competition (PRS for example), it can be pretty important there. ETA: BTW, this is honestly not meant as a call out. There are a ton of agencies and units that hire excellent shooters to teach shooting. Those people are not generally in-tune with exactly with how those skills will be deployed. To carry on with my boorish perimeter example, a department might hire an excellent shooter to teach their officers to reliably hit targets at distance. That person will have absolutely no input in how perimeters are set up, how DMR-certified officers are employed, or in how the skills are actually used. Much like Jerry Miculek and Rob Leatham have been hired to teach members of various units to shoot, but have not the slightest clue of how those units assault aircraft.
We still haven't heard exactly why the OP feels the desire to have magnification (and why they have decided 8 or 10 is the appropriate upper limit of it). That is truly the only thing that matters. If they are under the mistaken impression that such magnification is necessary or helpful in 3-gun, then your position is absolutely correct. If they want to shoot tiny targets at distance, if they are training for PRS, if they want a rifle that is optimized for defending their property in a SHTF scenarion, if their eyesight is such that they require magnification to just plink, or, if it just boils down to the fact they want magnification, your assertion that "for 600 yards and in IRON SIGHTS are pleanty adequate for 4moa sized targets." was not exactly helpful. But that may just be me being boorish :scratchhead: