I hear ya, and I will say, My consistency increased 5-fold when I got the new trigger. It can get VERY frustrating when shooting out to 1,000 yards if you "swear you did the same thing" and the projectile does not report. I think the new trigger disallowed the ability to anticipate the shot. It was very "instant" instead of "planned".
I will say this (gun first, then optics)
GUN - A 300 dollar bolt gun (Savage Axis) will get you to 1,000... Now, a matter of "how often" you make hits is a different story. A 450 dollar bolt gun (Remington 700 with varmint barrel) will get you better odds at getting hits. And, a 4500.00 bolt gun (AIAX) should get you even more hits... but maybe not enough more to justify the extra 4K. But, the idea for making hits is to eliminate as many weak links as possible and there aren't many to be had with an AI.
OPTICS - I believe, that the same rule applies as above. a second focal plane (cheaper than First FP) will have a unique set of challenges if not on full magnification. ALSO, most lower end scopes do not have enough MOA/MILS to dial into 1,000 (assuming we are using 308) and I have seen guys with 600 dollar vortex Viper (NON PST, NON FFP) have to hold over 20 MOA just to have the projectile land "pin high" (golf term) near the target. As far as optics go...
"Can a man hit 1000 yard target with a 100 dollar scope?" - YES
"Will the scope hold up over time due to the recoil?" - Maybe
"Will the scope be clear enough to make proper element evaluations at distance?" - Maybe
"Will the scope have enough built-in elevation" - Probably not
As I'm sure you agree it is important to eliminate potential problems and disadvantages with equipment. I do also agree that equipment "need" for tactical/self defense is vastly different than 1,000 yard bench shooting!