Commenting is valuable in many ways 1 way that I haven't seen mentioned is practice. The more meaningful comments you write the more practice you get writing content. This eventually shows in your blog posts.

Though I agree multiple blog posts per day is great for improving your Hive presence. This only works if those posts are meaningful pieces of content. The more frequent you can leave great comments the more likely you will be able to write great blog posts quickly.

@hivebuzz has a nice little tour you can take to improve your hive experience (https://hivebuzz.me/) while earning badges.