What, I've seen several mt actors and actresses talking about watching their colleagues on days off, to support them and the (back)stage crew and to enjoy the show. But since Carrie secretly hates her co-workers and has no love for musical theatre AT ALL, that answer doesn't surprise me. The only reason for her to like a show is because she's in it (or else she'd be going to the theatre a lot more, which even before covid she never did).
I mean, maybe you shouldn't be there if someone's covering you while you're sick (I think Connie Fisher did that during her Maria run and came to the stage door to give autographs while being sick? Someone correct me if I'm wrong), but if you have weeks off and want to watch the show, what's soooo bad about that??