>>110210867NTA, but if I recall (it's been a while since this specific event happened) she has explicitly cancelled a stream BECAUSE there would be special stream overlap.
Double checking, she was planning to potentially have a stream after Mori's anniversary stream last year, but then chat reminded her that all of Myth was streaming for that day, so she changed her mind so everyone can celebrate Myth Day. ("[NINTENDO DIRECT WATCHALONG] SILKSONG 2 WHEN?", 1:47:16 and 2:23:04)
In any case, personally, I think that's fine. I prefer that she do the, in my opinion, morally correct choice, as opposed to the option that give very slightly more arbitrary numbers. I don't care if others don't, that just means they have differing priorities. Our rock literally wears her heart on her chest, presenting it for everyone to see, that is to be expected.