No one here said that, either way canon/not canon is not really the point.
You beat me to it, sushi.
Indeed, the comparison chart and whether or not Sakura is like Kushina was not the point. Several users here were targeting a specific fan for his bias, which isn't fair or appropriate, in my opinion. We all have our biases, and bias itself is not a crime. Even failing to recognize that bias is not a crime.
It's much better to demonstrate why a bias is a bias, rather than make fun of someone for having it. That was the point of my chart.
Then why even compare Kushina with them? That was what the original chart was created for. Fine no one said that but it was deeply implied.