Your examples are things that most humans cannot do, or things that AI can already do. For example most humans, even most intelligent humans, could not write a well-received book, run a successful company, or make a popular game. On the other hand, AI can absolutely sort through research, draw conclusions on complex topics, and argue them persuasively. Likewise, I don't know what you mean by a "decent" conversation, but millions of people converse with chatbots daily, so I don't know why you say AI fails to meet that bar.