This is why there are moderators, and only moderators can remove posts. The post was not lost. It was hidden from view, and while it can be restored by editing (and the system explicitly PMs you to tell you this!), it can also be restored by a review.
People flag for all sorts of reasons. In my experience, those willing to take a ”neutral” stance are few and far between. Because we are human, we have our own internal biases and beliefs, and overcoming that natural instinct in the face of comments you disagree with but are otherwise acceptable is universally difficult at times.
There are those who can do it consistently however, and that’s why we gave them Leader status, which increases the weight of those flags.
While everyone can flag, the system tracks how often those flags are agreed with, and that information helps the automated system to decide when it’s time to hide a post. They system is, IMHO, one of the most amazing parts of the software we use, and allows Discourse to have a moderation system that is possibly an entire generation ahead of every other discussion system out there.
It isn’t perfect, and sometimes highly rated users still flag otherwise valid posts and mods have to unhide it. But those incidences are far, far less common that posts that are legitimately flagged and removed, or situations where a ”bad faith” flag is ignored because it’s from a user who routinely flags in bad faith, their flags now carry little weight, and since no one else has flagged the post, the flag is ignored.
This all works exceedingly well, and Discourse even gives us the stats to prove it.
No system is infallible, especially this particular meat-based moderator. But there are a ton of tools here to help us try to get it right, and we really do endeavour to review flags and take action quickly.