As if you needed another reason, Mailchimp has a blog post about subscriber engagement that's definitely worth a read if you have (or want) an email based relationship with your audience.
I'm amazed – but not surprised – by the insight that comes from having aggregate access to as much data as Mailchimp does. If I had to pick a single part that really stood out for me, it would be the data around permission. The difference in engagement levels for single and double opt-in is significant. Not surprising if you already believe in the importance of permission, but useful for convincing those who aren't quite there yet.
I'd recommend you read the whole post, but to the point about publishers, the engagement level for the 'media and publishing' category is much higher than any other.
Writing and behaving like a publisher, personally or professionally, might just help your overall engagement levels.