I'll say that it definitely is possible to be ill for a short time or at least recover enough in a few hours. (For instance, I used to randomly get super bad period pains - like unable to stand, on the verge of passing out level of bad - that could last an hour or two then disappear as suddenly as it started. But since they were so random/occasional, I had no way of predicting when/where it would happen - and I still had some friends be v. dismissive of it despite literally watching me experience it, never mind random strangers on the internet.)
Even something as simple (albeit embarrassing) as an 'upset stomach' can be fixed with the right medication but still needs some time to work. And I don't think anyone would want to run the risk of an 'incident' occuring if you had someone who could step in
So while I believe Carrie has probably felt well
enough to power through to avoid missing another show, she definitely could have handled it better. You don't need to broadcast your whole medical history to Twitter but even a simple "Unfortunately I am/was too unwell this afternoon for the matinee but thanks to Georgia for saving the ball!
" would go a long way - and just
ignore the people complaining after that.
You don't need to justify it further. But the more you double down on
insisting you don't need to justify it, the more people will start to demand an explanation