Just let it slide. They no not the evil that they do.
As for the MLC argument, aging is just a portion of it. There's usually some additional triggers (life change) that would make it an MLC. Death in the family, job loss, empty nest, etc.
Sounds more like your H is just conflict avoiding. He sees that its easier to run away and keep going to what makes him "feel" happy rather than stopping and thinking "hey maybe it's me!"
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.