That's garbage.
You are saying that a girl has to run full speed at a catcher hoping they get out of the way at the last moment. All of our girls won't truck a catcher and do slow because they don't want to make contact. This is the same logic that causes the no interference without contact that only encourages injuries.
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It's not garbage, it's the rule.
When the runner slows down due to the position of the defensive player without the ball, that is the textbook definition of obstruction.