Johnwill, I guess that it just comes down to a matter of taste and needs.
For some people, the RRA trigger over the stock trigger is a vast improvement. But even on the stock trigger/hammer, there are ways to improve it without having to mill it.
The quickest way to improve a stock trigger is to install a setscrew under the trigger in the pistol grip threads. Using the setscrew, you limit the trigger take-up by tighten the screw until the trigger is tight against the bottom of the selector when the rifle is on safe. On some rifles, this will take up at least half or more of the take-up travel before the hammer breaks. Then install shims to the sides of the trigger (at the pins) to remove the sideways movement of the trigger. This prevents the trigger from canting when pulled, and again produces a crisper trigger feel.
The hammer/trigger sear surface can be polished and the pins can be polished to take out the gritty feel of the stock trigger. To lighten up the stock trigger, the hammer spring can be tweaked.
If you compare this trigger to a RRA, the only difference will be the two stage pull verses the single stage of the tightened stock trigger, And the stock trigger add-on have cost you less that $1, over the $100 for the RRA trigger.
Note: If you have a mill, then you can set the disconnector to release the hammer at the end of it's stroke, and set the hammer sear for a creep less trigger break. But this part of working a trigger over, should be left to a smith, including installing a trigger over-travel set screw.
Don't get me wrong, I like the RRA trigger, it reminds me of my days using a M-1 match rifle. It's just that the stock RRA trigger is a few steps back over a worked factory trigger, and lacks the precision and versatility of a tuned Jewel trigger.
If given the chance, try a worked-over RRA trigger to see for yourself how much of an improvement the smithing of the trigger can achieve. As for the Jewel, It can be swapped from rifle to rifle, and still only need to be tuned using a few wrenches.
To summarize, John you are correct, most people will never need, nor require a true type match trigger. Most of the time, a standard AR-15 will out shoot them. It's the few that will step up to the plate and discipline themselves to become match shooters. It's here where the trigger/rifle must be at it's best, and not a limitation to the shooter.
Just food for thought.
Or
Trouble shooting is not only limited to the rifle, but the shooter as well.