He didn’t ignore it. He wrote that he sees now that there is a Hetter but he will continue to be Makpid Keshuras Haddin. V’tavo Alav Bracha.
As a rule, if you want people to admit to you when you are right, you have to allow them. If they know that you’ll laugh and say, “See? I’m right and you’re wrong!”, they’ll just refrain from admitting. Just as you must be a gracious loser, so to must you be a gracious winner. Ben’fol Oivecha Al Tagil.