I’d just ignore such folks. Plus I have yet to meet those folks - even after 62 posts I have done!
I don’t go for Internet points only. That also fuels me to trying coming up with something of quality, but it’s also the good discussions and possibly providing something interesting to folks to read/look at and to make them even think about stuff that gets me going 😄 Kicking in some extra activity in these communities!
But the same can be achieved with comments - you’re right with that one.
Making a post can require more thinking and effort, but I wouldn’t be surprised if I have spent more effort on a comment than on making a post!
The feel and interaction is different with a post and a comment. A post can wake up all sorts of commenting and a post is “more visible” to people who sees it as they scroll away. Comments of course also provide activity within a post/community, may generally be less visible to more people (you have to click a post open to see comments) and they can also gain all the off-topic commentary on them - just like in a post.
Not saying that commenting is worse than creating a whole post. Both have their reasons to exist and their places to be used.