When one person clogs up a #hashtag I follow so completely, that no matter how long I #doomscroll, all I see is that one person's posts, one after the other, seemingly forever. Aaarrgghhh!!
This morning I wrote a #bash alias that switches into a repository directory, checks out the main branch, opens #macos Finder windows for two subdirectories, launches a new #firefox Nightly window, waits a second, and then opens four URLs as tabs of that new window, so yeeeeaaaahhhh, I guess you could say the day is going pretty good so far. #unix#script#nerd#hashtag
As you can see, you're only addressing the tags as #labels following a post, whilst most folks tend to #hashtag their #articles inline as they type out their posts.
Having a facility to integrate those two methods is of great benefit and note that in my example not all #tags are duplicates between the two methods of presenting them.