I'm 39 and had 2 strokes last fall. Nothing prior. I am also alone all day, since I work from home, and our nearest neighbor is a 15 minute walk away. My 74yo mom lives alone on a mountain in a house that's nearly 6000 sq ft. I worry, but she is still responsible for her own actions. I can't "make" her do a damn thing and I wouldn't even try.
It's one thing to show concern and to politely express fears about your parents' health and to communicate suggestions as a family. It's a completely different story to barge into your parents' home, talk at them like they are children, and to try to rearrange their furniture without their permission. They're aging, but their mental capacities seem unaffected. Unless you're trying to prove them incompetent, you can't just start ordering them around. As previously noted, Glen still works every day. If someone in this scenario is going to have a forthcoming health scare then my money's on Whitney. Her parents may be getting older, but Whitney can hardly make it through an entire dance without stopping, and we've seen HER at the hospital with health scares, too, yet I don't see anyone showing up at her condo saying, "Okay, we've decided that you're not healthy enough to live on the 4th floor so we're moving you..."
Babs and Glenn are aging, but they're still adults.