Goodness, it's not that bad.
Let me elaborate.
I'd rather die than get old. I have no doubt that most people enjoy and will enjoy their seniorship, for the reasons you have stated and some more.
In my case, all I can foresee in my life is working in low qualified jobs until no employer is willing to hire me, and then survive on the leftovers of society while seeing my physical and mental health dwindle every day until the gruesome end, sooner than later.
What kind of person I want to be when I get old? Someone with such a good physique and health, that I can be sure I will be standing on my own legs until the last day, with my mind remaining as sharp as it is today or more, and with people around me who care for me and for whom I care. I have reasons to doubt any three of those will accompany me into my eldership.