It appears that something is not right with airline maintenance.
I heard after the door blow out event the NTSB requested the maintenance records and Boeing refused to immediately turn them over.
That looked suspicious to me just other face of it.
The airlines are catching up to other industries who've suffered for years from policies rewarding the incompetent due to programs such as Didn't Earn It (DEI), widening the gap between compensation and skill sets required.
Commercial air travel in particular has changed due to commoditization, accelerated with the rise of fractional jet ownership which pulls away first-class customers, lowering the funds available for compensation of maintenance employees.
As more capable staff retire, leave before retiring, or choose other jobs instead of entering aircraft maintenance, expect to see more of these problems.