I mean... I can see it both ways.

When people engage with content, they have expectations going in - they expect to know if the content is fictional, truthful, or intentionally ambiguous.

For example, if someone watches a documentary and finds out it was all made up, they'd be right to be upset, because it presents itself as honest.
Likewise if someone watches a fantasy movie, they don't have the expectation of honesty.
And if someone watches something like the Blair witch project, they go in knowing that it's dubiously truthful. It's a bit of a grey area because the deceit is part of the art.

Streaming is similar, vtubers are obviously fictional - nobody really has expectations around what they're really like.
But if someone builds a following around being authentically themselves, and then it's discovered that they're lying about significant parts of their content, I can understand some degree of outrage.

I don't really watch streamers because the dynamic between streamers and viewers seems toxic AF, where streamers are kinda forced to pander and appear personable... But I still understand being upset when you find out what you got isn't what you were sold

She's stealing the identity of a marginalized minority, I say she didn't get enough hate, this was an old case, the meme is just being recycled.

Not sure what sort of content this person made, but if I found out one of the trans creators I pay attention to was faking it I'd be kinda pissed.

Then again most of the trans content creators I pay attention to are either talking about trans specific issues, or shit like franlab where the content is very focused on the hobby and not the person.

Why yes, I do watch femboy streams. How could you tell?

One of the main advantages that streaming has over other forms of entertainment is that it does create a sort of relationship between the streamer and the viewer. Generally the viewer knows that the streamer isn't really his friend, but the viewer does feel a sort of human connection to the streamer which relies on the assumption that the streamer is being authentic.

I'll be frank: if I watch streamer content, it's because I'm feeling lonely and watching it is a little like hanging out with a friend. Obviously it's not the same because it's almost entirely a one-way interaction and I know that the streamer is deliberately creating entertainment as opposed to doing what he's doing purely for its own sake, but I would be disappointed if I discovered that a streamer's whole identity was made up.

I think people would be upset that the streamer felt the need to lie in the first place