time-ex:
I sincerely hope that history doesn't repeat itself because there has been precedents and I highlight two that anyone can research.
1 - JAL Flt 123 in 1985 747 bulkhead repaired only to fail about 12000 flights later.
2 - China Airlines Flt 611 747 tail section repaired only to fail 22 years later.
I do not believe either of these incidents support your point, in that in both cases, the aircraft were improperly repaired, contrary to Boeing specifications.