I totally understand your point, but that is pretty much the case for any opponent fighting Hazama, I was just pointing out that Houtenjin is definitely not THE END of her offense, as it actually just creates a complicated offensive/defensive situation. On the risk/reward table, Hazama is forced to guess whether or not you are going to continue your blockstring, and risks potentially big damage on a wrong guess. Unless of course, your opponent is a godlike frame perfect machine, who can IB an attack, buffer the input for houtenjin, see the starting frames for your next move, then execute houtenjin without unblocking or blocking. If that's the case, I don't think anyone can win against that.
And in regards to 6B, my only point was that it was safe against Houtenjin, the huge damage punisher. Any character can IB it and hit a button, and so in that regard, it's actually safe against no one, so I would argue that it is not an issue that makes the matchup vs Hazama worse, but a fundamental weakness of the move across the board.
Edit: I don't think Hazama is #3 btw, if you want to discuss it, I'll be happy to, but it's definitely tl;dr for this thread.