I’d say it seems inconsiderate to me, though sadly not unusual for many teens in the USA today. I wouldn’t blame the children personally though. I doubt it’s a personal issue. More like how young people tend to respond when faced with US culture, education, economics, pop culture, parents who both have to work, problematic family relationships, and lack of education in how they’re expected to behave. Wanting to escape into staring at electronic devices most of the day has been par for the course for a long time. So has not giving much consideration for (or time or attention to) the elderly.