Arguably. Reading the comments on avhearld, the cowling latches to each other rather than to the frame and the latches themselves are very low and easy to miss. Airbus has tried to eliminate this potential oversight, whereas Boeing has not. So yes, potentially missed non walk around, but also a possible systematic design failure.
Failures of design can lead to maintenance failures. Where as maintenance failures do not always stem from failures of design.
So not mutually exclusive in this case.