Warum Wordpress-Blog verwenden, wenn ich Discourse habe?

It looks like Discourse uses Wordpress for their blog on blog.discourse.org. Is seems redundant to me to have this here if it’s mostly replicated on https://meta.discourse.org/c/meta/blog and you are directed to go back to the forum to post comments. I wonder if Google thinks the content is duplicated, too, just seems easier to have all on Discourse in this case and lose Wordpress.