There's an old saying. You can lead a horse to water but can't make it drink. When parents hit this stage you can't even lead them to water without a ruckus. They get stubborn. Sounds you are doing all of the right things and I wish you well.

I know you are being rational and explaining what needs to happen to them. It doesn't work. When my dad was still alive he had reached the stage of limited mobility, had to use a walker or wheelchair. He didn't want to use either, because he felt that he didn't need to. Until he fell and then wanted someone to pick him up. Mom would want to help but couldn't pick him up, I would ask where his walker was and why wasn't he using it. I don't need it would be the reply, of course it always made him mad when I said then how did you wind up on the floor this time. His walker had several horizontal bars on each side, I would brace it and tell him to pull himself up and get on his feet. He would refuse and tell me to pick him up. It really made him mad when I said that I can't because you significantly out weight me and that his current choices are climb up the walker or I'm calling the paramedics to pick you up, then you get to go for a ride to the ER, once there you will probably get to go to the rehab place for about a month before you can come back home. He would yell and tell me that I can't do that and that I should get out of his house. I would reply with you can't do anything because you're on the floor and can't get up. Somewhere through this he would get mad enough to climb up the walker and within a few minutes he would forget the whole thing happened. We played this game several times a week... I always thought I was smarter than my siblings for not getting married.. Guess who moved in with the old people.

Having said that, me being able to do that meant that mom was able to keep dad at home longer than she would have been able to without me here. I'm also not saying this to make you think that you need to move in with them either, no guilt or implications are intended. I'm still living at home with my 83 year old mom. I can see her slow down a little. She's doing well and still driving, my brother, his wife, and myself ride along with her often enough to keep an eye on her driving abilities. But earlier today we were talking and she even talked about how as we age we get a lot more stubborn. I whole heartedly agreed.