You're missing the parent's point. It's not about lacking a change control process, but about having the ability to instantly change the state of a flag when necessary. Moreover, these two can coexist effectively.
You might want to look into using giscus[1] for a commenting system on your blog. All it needs is a public GH repository to host the discussions, after which you simply embed a script into each blog post, and visitors will be able to leave a comment using their GH account.