Human spaceflight and AI

I was just thinking, there may be a rather simple point that will make
human spaceflight more or less irrelevant. Suppose at some point,
quite possibly in just a couple of decades, we develop computers that
have the intelligence of human being. Then why not send AI there
instead? There would simply be no economic reason, except tourism, for
sending humans into space. An artificial entity would could be made
infinitely more suited for any task, especially with the help of
advanced nanotechnology.