Okay so it is theoretically possible but is it plausible that this could be a common use-case?

Anyway, you said "it’s still the same echo chamber that all social media is" - and that statement goes far beyond using the Fediverse as an echo chamber to say that it is that way for everyone (further implication: all the time). i.e. the most command-language interpretation of your words would be that they meant that that tiny little theoretical possibility is what this place is, therefore I wanted to point out that there is so much more to consider, e.g. there are other ways to use it.