Rule question

[WestMichBlue]

"Catcher begins to throw to thirdbase but does not throw due to CR in her line of fire. "

How do we know why she did not throw? Do we know that she didn't want to risk a bad throw? Or that it was too late? Or that the ball slipped in her hand so she stopped the throwing motion? Or that she didn't have a brain freeze?

What ever happened to "No throw, no interference?"

If this play was down the 1B line, and the B-R was outside the 3' lane, and the catcher turned to you and said "I can't throw Blue, she is in my way," would you call interference?

If a batter backed out of the box and was right in front of a catcher who failed to throw on R1 trying to steal 3B, would you call interference?

What is the difference between these plays and the OP's play? Are we letting the legality of the CR cause us to automatically assume the catcher was interferred with?

WMB