Since when have we ever had even a single product that can ever be proven? Chernobyl was safe, over and over we've believed in "proven " products.
Don't be daft. A "proven" tool can give out the day after that one year warranty and round number 1,001 may be the one that goes nuclear and vaporizes half the county.
The people who say a thousand rounds are being ridiculous. If magazines and pistol function well for a few boxes of various brands and a box of the chosen important rounds, that is all that you can expect of an off the shelf mass production machine. So start carrying, and take it to the range with you to continue testing.
there is a reason for doing stoppage drills. you will never be certain. If $1,000 worth of ammunition is the bare minimum for some people before they can comfortably carry a sidearm for defense they shouldn't buy an off the shelf gun, and they sure as heck shouldn't be buying third world bulk stuff.
The reality is that some people have two kids, rent, a car payment, and that doggone boy keeps getting cavities. Getting a gun to save lives and seeing that gun and shooter can hit center mass is good, putting one's fiscal status at risk obeying arbitrary rules is bad. What should they leave out of the budget? Car insurance?
Every day involves a chance of violence, and a risk for death or injury. Spending three months rent on gun, ammo, range time, mags, holsters, may lower the chances of death or injury, but the possibility is almost incalculable.
Imo, 3 different boxes of top brand target grade ammo and 100 or so defensive rounds will show that the equipment is reliable. $200. $1,000 can buy a common handgun on sale, a shakedown ammo pack and carry pack,nylon holster, extra mag. After that, practice marksmanship and handling, and with every landmark that is passed, the level of safety climbs exponentially.