I don’t think it would do any good. Kenton is in full on man-child mode and would refuse to see the hypocrisy of his position. I don’t think even asking him how he would feel if Freddie had been supplying Meriel and she had OD’d would cut any ice.
I’m not saying that Harrison couldn’t have done things differently but Kenton sold at least be able to recognise that Harrison was in a very difficult position and Freddie really had no one to blame but himself.