The thing that I noticed was her departure time - 11AM! On snowy summit attempts, it is much better, and far more common, to depart in the early AM (3to 4 AM, the so called Alpine start) to take advantage of firm snow and ice and lessened avalanche danger. You arrive at the top at 11 and return quickly before thing heat up and the avvies begin.

Hiking alone in these conditions is not a good idea. Of course neither I nor anyone on this forum has ever done that. Have we?

Moving in a whiteout is not a good idea.

For all that, she did a lot of things right, as others have remarked. She gets a passing grade and will probably learn from her mistakes, like we all do.