Think about it like this: the hashtags are large-scale dragnets to fish for possibly interesting/categorized notes. But whenever someone I follow, boosts a note, then it is essentially "endorsed" by a first degree connection in the network (graph).

So I would mute certain repeating notes, e.g. bitcoin "whale alerts", but I would want to see the special alert that my contact boosted.

I know, you prly got the point already, but still.