I don't generally disagree. Though I think it comes down to the quality of the writing. There's nothing inherently wrong with an adult going to their parents for some guidance occasionally. Overdone like anything else it becomes a problem. In the hands of the same writers I think it'd be the same problem with flashbacks as there would be some homespun flashback for every instance.
I do like Pa's death as a wake up call that his powers can't save everyone and think it's a powerful point to make. Which is why I dislike takes like Morrison's where they are killed by a villain or Snyder's take where he lets him die. That's stuff his powers can stop, so it diminishes the deaths.