Because it says 199 right now and I have one comment alone with 150+ and a post with ~135, plus 150 or so more comments most of which are between 5 and 30 and I don't think any of which are negative. Like 3 days ago it said 500 something. I don't know the best way to get a correct number, I personally don't care tbh.
Edit: and please don't take that as me being dismissive or an asshole, I hope you find a way to properly figure it out. I think I've seen folks say it's in the Lemmy instance database but idk I just have the database running, I wouldn't know where to start on how to check.