Hello ~inquiry, thanks for going through the troubles of explaining a possible answer.
a sort of "What's the point of having a persistent presence if/when almost nobody acknowledges posts and/or wishes to interact?"
Well, while I can accept that others wish for interaction, I do not write for "them". At least not as a reason or excuse to write. I know, that readers exist and very occasionally I receive a quote or email message. However, I have been called guilty of producing almost exclusive "tech type" content. And yes, that's what I mainly write about. In the hope that it may be useful to others, as an acknowledgement to those who answer a lot of my technical questions by their writing. I have voice my personal strong opinions a few times, e.g. here now, or when ew0k excluded some gemini site from their ~antenna feed and the word "censorship" was thrown in. My choice. If no one reads my posts, fine. I have referred back to my own posts in the past. So they are for my future self as well.
Any expectation of interaction is quickly leading to extended online time, the word "addiction" comes to mind. And that is exactly how the likes of twitter and facebook work. This is why books on "Digital Minimalism" even exist. The question has been raised here not long ago. I have not been on social media other than uucp some 30 years back. I am stuck in the age of mailing lists :).
There is one more comment I wish to make. By deleting their own posts, ~tffb has also rendered the threads with answers unusable, they very much n-ack-ed the existence of those very interactions, they wished for. I don't get this.
Cheers!