Actually, that result would be newsworthy. But this is not that. This is an anecdote from a pot user saying that he likes using pot. That's really all it is. It's not bad, but it's not something that's going to change management at the level of the medical system, and it's certainly not news that, anecdotally, people on marijuana often behave friendly.
If this were a randomized controlled trial (or even a cohort study) showing that pot use actually does improve some measurable parenting outcome, it would actually be hacker news-worthy, in my opinion.
First, I'm not saying that getting high is bad, or good. I'm just observing that this particular parent likes to get high, and I don't find that newsworthy.
Whether I consider taking a prescribed medication "getting high" depends on the dose and the use-case.
Vicodin contains an opioid, so if you are not in pain but take it, you will get high. Actually, its codeine derivative is variably metabolized so you may not get high (or pain relief, for that matter).
Xanax (alprazolam) is a benzo, whose effects are similar to alcohol. I don't think most people would consider this a "high", whether or not for therapeutic purposes.
Ritalin (methylphenidate) is a stimulant; people do use it to get high, sometimes even people who are prescribed it for a real medical problem.
The 'high' is a side effect of many medical therapies that we'd like to get rid of, if possible, to improve our ability to help people without the scourges of addiction and abuse. The same is true of marijuana, for some uses; for this particular person's use, however, the goal is to get high.
What it really does is conflate the effects of marijuana with that of heroin and other substances targeted by federal drug laws. In reality they each have distinct pharmacological effects.
The only remarkable thing in this story, in my opinion, is that it is a reminder that there are cannabis dispensaries in California.