My problem is that it just begets more low effort posts; if people see that by making these low level comments, they are going to be rewarded with attention, then it just encourages more of that.
Additionally, on top of that, if people see that putting effort into posting thoughtful responses doesn't get the same reward, they are less likely to do so.
Ive seen it happen numerous times on reddit where small niche subs were originally very good with mostly high quality conversations and discussions, but eventually those original people got crowded out by the influx of low level posts, and many of the people simple left (it was kind of like how the universe or TrueReddit subs came about).
I get there isn't much to be done about it, or at least I can't think of it, but I still think it's important to bemoan something that is actually bad for high quality discussions.