The Pinto an the MAX are drastic preventable failures that took the lives of passengers. If your take away from these failures is that the American public is somehow at fault for blowing things out of proportion you have come to the wrong conclusion.
If they had sufficient information to put people's mind at ease as you described above then the inherent failure is not providing it because it was entirely certain that everyone's mind is going to fill in the blanks with the worst possible thing that fits the bill and everyone's mental pictures is going to be of air frames disintegrating in the air. This was entirely predictable.
More likely the actual details haven't been communicated because it isn't nearly so reassuring. Let me speculate blindly...
It's a structural part the failure of which threatens the life of everyone on board the plane but rather than merely failing 5% faster it would never have passed spec in the first place and would if left alone have been found in the aftermath of hundreds of people hurtling to their fiery deaths and would tend to have started failing when the part failed halfway through its original expected lifespan.
It is only not an immediate threat to safety as 787s have only been around for 9 years and we still have literally single digit years before they would have started falling out of the sky so because they managed to discover this before falling planes took down the rest of their reputation they have time to strategize how they will take care of this in a way that simultaneously isn't ruinous to them or airlines.
This is like discovering your breaks don't work a half a mile before the edge of the cliff instead of 100 ft from it or having your appliance catch fire when you happen to be on hand to use your kitchen fire extinguisher.
They never should have moved substantial operations to a state full of complete idiots who can't be trusted to operate a toaster let alone build planes. THEY are reaping what they sowed.