And we spend HOURS per day with our parents when living at home, even when teens. Evenings were hanging out as a family usually, whether that meant reading in the same room, watching movies, playing board games, whatever. All during the evening when they got home from work.
Heck, family dinner alone is an hour a day.
I was home "with my family" for 6+ hours but we were definitely not interacting with each other outside of meals. I was on my computer, siblings on tv, others doing random stuff. Nothing unreasonable at all.
The article is trying to point out about quality time not just physically in the presence of each other.