If my grandma were alive I'm pretty sure she would just take it as a stubborness thing. She was mid-80s when she passed away this past September and she'd be upset if she couldn't go to the casinos once a week (which are now closed) or dropped off at the grocery store if the place she lived at was concerned about exposures, etc.
She didn't listen to anyone about her smoking or her drinking, she didn't listen to anyone about making sure she got up and moved throughout the day or various other things. She wasn't going to let anyone tell her anything to do.
I mean it's possible she experienced stuff but in all honesty I think she was just a stubborn person
**I shoud mention I loved my grandmother very much but we all recognized her flaws (and we all have our own in my family as well).