Okay, fair enough. This was a less experienced pilot who was doing a qualifying flight with an instructor and a technical support NCO.
The problem is, of course, is that all the branches are having a hard time recruiting and retaining personnel.
Well, you are leaving a few points out.
The first was that the instruments showed her in her flight zone... This might be a case of instrument failure.
The supervisor allowed a sick employee to go home. A sick employee can't do his job to efficiency and might spread diseases to the rest of the team. The days of "toughing out a cold" went out with Covid.
ATC are 85% male and 75% white.