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.
Posting something on a domain with your name attached to it is an endorsement of sorts. You can argue with that all you want but that's just how it works. Having a dialogue happens on neutral ground and Tao's blog is not neutral ground, even if that might be his intention.