Maybe I just don't get it
I would tend to agree with you. You just don't get it.
My daughter made what I consider a mistake and showed very poor sportsmanship one game. She smarted off to an umpire about a call on a steal to 2nd. The umpire told me about it. She went right back on the field and apologized for it. She found the umpire again after the game and apologized for it again, or else she didn't play the next game. Not having that. She owned her mistake.
This girl and everyone around her seem to be wanting to make excuses and justifications for her actions (I know the girl hasn't come out publicly). As you said...they were very bad mistakes at a minimum. Those around her are teaching her that you don't have to admit your mistakes or own up to them. That is the problem for me as much as the actions. Had the girl come out the next day and told of the emotion of the game, how she had gotten caught up in back and forth, etc, I would feel differently. I wouldn't feel better about what she did, but I'd say she at least learned something from it.
And for the 18th time, for the love of God, her foot is on the line. There is no play at the plate whatsoever. She is violating the rules of the game, as well as being a poor sport. The plate is entirely encompassed in FAIR territory. What many of you are saying is that the girls should have altered their direct line to the center of the plate, from foul territory already, to avoid a catcher who is violating the rules.....in a state championship game where every single run counts. This isn't pool play. Possibly the catchers TB coach and high school coach are not very good at teaching the rules of the game, I don't know. But you would think that somewhere along the way they would have told her that she can't block the plate without the ball.