For the record...
I can tell everybody on this site that being a (in my case, sole) caregiver is the most mental, physical and emotional test of endurance that I've ever had.
And I don't need to have a doctor sign off on that, nor do I need some study or MRI to prove it. But it is something that I can state as a fact and it's up to everybody else to credit it or not.
Some do, some do not. Because generally people have the political tied to the personal, to varying degrees, is why people either debate or not when it comes to states like I did concerning Biden.