If all it takes to be a “real artist” is drawing proficiently
I think you are miss-understanding the argument.
Pro-AI folk say that being anti-AI, as a digital artist, is hypocrisy because you also used a computer. Here it is shown that, despite not using a computer, the artist is still able to create their art, because there is more to the visual arts than the tools you have to make it. This puts rest to the idea that using digital art tools is somehow hypocritical with being against AIGen.
The argumentor is not saying that not knowing how to draw proficiently excludes being an artist. They are just saying that real artist do not need a computer program to create their arts, much like performances or installation artists you mentioned.
Not if you are part of the AI-bros club. There is a reason Marketing agencies insist in using the term Artificial Intelligence.
Unfortunately, this is not common knowledge, as experts and Marketing Agencies explain Machine Learning to the masses by saying that "It looks at the data and learns from it, like a human would", which combined with the name Artificial Intelligence and the other terms, like Neural Networks and Machine Learning can make someone think these things are actually intelligent.
Furthermore, we, humans, can see humanity where there is none. We can see faces where there are no faces, we can empathize with things that aren't even alive. So, when this thing shows up, which is capable of creating somewhat coherent text, people are quick to Anthropomorphize the machine. To add to this, we are also very language focused: If someone is really good with the language they speak, they are usually seen as more intelligent.
And finally, never underestimate tech illiteracy.