I think it’s quite normal for a forum discussion to have several errants, if I may call them so.
Some readers are interested in some aspects of a posting, other readers are interested in different aspects. That’s quite normal, I think. Each reader then reacts to those aspects that have his or her specific interest.
Also remember that if there are more postings related to one of these aspects, then there are necessarily several contributors who share in interest in that aspect. I see nothing special here that doesn’t happen on just about any forum.
If other readers are interested in other aspects of the same thread, they are of course welcome to write their own contributions. The more readers are interested in those other aspects, the more postings will appear on them, so the thread will automatically gravitate toward those subjects that have the highest shared interest of all readers.