Ugh. I'm really not happy with this answer, but I can't put my finger on what would be better.

Also, it doesn't matter that he didn't mention his mother? You can love, grieve over and care well for an ageing relative while still facing the reality that they're going to die, and that things will go better if you have a plan for what to do next. LW didn't focus on her because he's not writing an apple pie recipe with 6,000 words of backstory about family memories, he's talking about the pertinent things. Prudie's moralising is just unnecessary here.