That's an interesting and important point. I suppose if everyone takes this attitude then society would fall apart, unless people are spontaneously feeling the need to connect with each other. But I'm skeptical that you need to acquiesce to the increasingly corporate communications vying for your attention, just to stay available for real human connection.

The internet is a medium that facilitates asynchronous communications with like minds. You can leave a comment on a website, or link to your blog post, as a beacon to anyone who's opted into a similar filter bubble. They can find it and contact you. Yes, it will be unsolicited, but not in the same way as a marketing email or billing notice is unsolicited. Nobody is communicating without consent when publishers and readers are participating in a shared community.

If I publish a blog post on my hobby, and someone I've never met emails me about partnering on a project for the hobby, then although it's unsolicited, I would still appreciate the email and follow up. It might take me a while to notice it since I only check my email every few days, but I will almost certainly reply. A personal connection is a welcome respite from a noisy onslaught of automated communications.