Well, you're wrong, given how many of the guest posts featured by Tao are inherently contradictory and so it would be strange for him to be personally endorsing each one! He also posts his own views elsewhere: see https://teorth.github.io/tao-web/ai-views.html.

The obvious goal is to highlight differing attitudes within the mathematics community so the mathematics community can have a dialogue and see what other people are thinking. Luckily, most mathematicians seem to be able to actually read and understand not all posts are from Tao. It is unfortunate it seems many people on this site cannot.

If he thought it was fundamentally an unreasonable position he probably wouldn't do that. But he seems to be running his blog as something of an open(ish) forum for AI commentary. I suspect if he thinks it's a reasonable position that happens to be entirely incorrect he still would post it...