It’s not true in my case, I feel like half of the flags are wrong. Most of of the posts flagged as spam are actually inappropriate/off-topic posts.
Since spam flags are treated very seriously by Discourse, I can’t agree with those flags but have to defer or disagree it. It leads to another problem, my members will find that I actually don’t care of their flags but I can’t tell them why I disagree or defer it in an easy way.