If the performance of any of those that is truly affected by circumstances out of their immediate control they can absolutely play that card, and rightfully so! It has nothing to do with their competence. COVID hit and severely affected the ability of teachers to give hands on guidance to students. Does that mean they let their students down? A plumber or electrician is dependent upon the supply chain to service customers. If that supply chain is interrupted by ships stacked up at various ports does that make them incompetent? A police officer cannot do his or her job as efficiently when said COVID has knocked out half the force. Does that make them poor officers? A mother or father cannot provide as well for their families if their jobs have been eliminated. Does that make them bad parents? Unexpected illnesses have led to the downfall of military engagements throughout history. These are all outside influences out of their control.