I can see how you might read that from my post, and I'm not necessarily disagreeing, but the main reason to focus on blogging in these analyses is the social proof associated with it on chain. That social proof type of evidence allows us to determine that active blog authors are (relatively) reliable as a proxy for real active users, which is much less the case for metrics relating to other use cases.

For other metrics, bot-noise is harder to measure and likely a lot higher.