So it boils down to that the mattirim feel that they are not in full dispute with Rav Moshe. And perhaps in the current day, Rav Moshe would agree to permit it.
I understand that they are not lying in their assessment. still, it’s all conjecture that Rav Moshe would permit it. Maybe the opposite. Today, Rav Moshe would absolutely forbid it. It’s basically saying that the mattirim feel ready to move on from Rav Moshe.