If you claim otherwise, post that specific evidence here rather than handwave.
Let's be quite specific:
1. NOBODY said the technologies were infallible.
2. NOBODY has ever claimed we can identify everything about unidentified objects in the sky - such a claim is simply ludicrous.
3. And here's the rub, you tell us - WHY are all the 'good' UFO reports from the 50's thru 80's? Show us some from the last two decades - cases that include good footage/data from FLIRs or radar, etc..
That was my point, back in the good ole days, pilots could easily claim it was a UFO when they had performed wild maneuvers or used weapons in peacetime, and not only would you get away with it as the tech wasn't there to verify it, but your superiors would happily accept it as it helped them keep their jobs and justify extra expenditure.
Stop making up fake arguments and putting your words into other people's mouths.