Fortunately, your niece understands the issues. Too many do not.
I had a college-age guy tell me he didn't think some old people in nursing homes dying should affect him going to college. He didn't care if he got COVID - he was sure he'd survive it. My reply was "What about your professors, parents, grandparents, and others who aren't so young and robust that you come in contact with that won't be so lucky?" He didn't have a reply for that...
Exactly my point. I think maybe it's they don't care and not enough warnings from health officials on how their complacency can harm others. I would like to see commercials from the CDC or other Govt. and local health organization constantly on TV, I haven't seen one yet. Put bumper ads on Youtube, broadcast, and other streaming services. But I haven't seen anything. I guess it's wishful thinking.