It’s true enough advice, though. She has an emotional problem, not a rational one. She probably knows full well that her response isn’t rational, but she still feels the feelings she has. Explaining the rationale and logic she seems to be missing is only going to make her more upset. Versus, instead, figuring out what her actual problem is. Maybe it’s a long standing issue, having texts ignored. Maybe she has some past trauma, or something specific happened that day that just set them off.
It’s not always about being right or wrong. Her response, we all agree, was a wrong response. It’s one that I’d be considering the relationship for. But it’s also one to learn from, for all parties. Someone having a problem stemming from an emotion often isn’t going to be made better by logicing the situation into submission.