The claim isn’t exactly “Boeing can’t make a good plane anymore”, though.
It’s more like non-engineering culture resulted in a push to create a new plane as quickly and cheaply as possible. In other words, the execs at the start of the process created an impossible task that the downstream employees couldn’t follow through on. In this sense, it is consistent that under “normal” conditions, Boeing could still produce a good plane; the problem is that nobody wants to or is able to enforce those conditions.
It’s more like non-engineering culture resulted in a push to create a new plane as quickly and cheaply as possible. In other words, the execs at the start of the process created an impossible task that the downstream employees couldn’t follow through on. In this sense, it is consistent that under “normal” conditions, Boeing could still produce a good plane; the problem is that nobody wants to or is able to enforce those conditions.