Not talking about the emotional or physical side for a second, I mean all the coordination around it.
Doctors, appointments, prescriptions, Medicare/insurance, home care, rehab, records, transportation, calling places that never call back…
What has been the biggest recurring headache for you?
I’m especially curious about things where you thought, “surely there has to be an easier way to do this.”
https://www.agingcare.com/questions/what-part-of-managing-someone-else%E2%80%99s-healthcare-takes-up-way-more-time-than-it-should-499722.htm
The generic answer to your question is, "Healthcare in the US is complicated and full of hoops." Knowing this, it's up to you to decide how much or little you are involved. There are other solutions, but you have to be willing to accept that they aren't perfect and you'll have to stand by and watch the imperfect solutions play out.
Hiring a Geriatric Care Manager can be an option if affordable for the elder.