When the offensive player beats you or your teammate to the basket, you don't compound the mistake by fouling. You don't do this five seconds into the game, and you most certainly don't do this with five seconds left in the game. In this case, Williams-Strong can shoulder the bulk of the blame. It wasn't a strategy issue or a confusion in the scouting report. It was a fundamental issue gone wrong. A player learns not to give up more points than their lead in grade school.
Is Williams-Strong the sole player to blame for the loss? Hardly. She actually had a decent game. On the other hand, Nicole stunk. Ticha couldn't hit the broad side of the barn. The bench really didn't do much of anything.
This was a classic case of being at the wrong place at the wrong time. But she is a professional basketball player who gave up a game-winning three-point play. For that, she deserves any blame she receives.