Also native speaker: I'd say a closer translation would be "this post is based on many good points". Or "founded on".
I don't know how universal this is (I don't see anyone else making similar points yet..), but I use all three phrases because at least in my head they have subtle differences:
* "Comprised of" means the pieces make the whole, or at least the basis for the whole, and are an important part of it.
* "Composed of" drops the "important part of it" from "comprised of".
* "Consists of" is even broader, not only including "parts that make the whole" but also "a unit that can be broken into parts".
The differences aren't always relevant, but meaning is lost if they're treated as the same thing.
Edit: Found two further down on this page who each made one of my points, but not all three, so at least I'm not alone here.
The post isn't making anything, it's just sitting there being read by us. The author, however, made some good points in the post.
Additionally the verb to comprise isn't suitable here either, so it's going to sound awkward no matter how you try to rearrange the sentence. The "composed of" or "consists of" alternatives mentioned in the original page aren't really a good fit either.
There's no need to complicate things: this post contains many good points.
In truth if someone said or wrote any of these sentences, I wouldn't mind whatsoever. I know exactly what they meant and that's what matters. However since we're having a bit of fun, I figured I'd weigh in :)
"This post is comprised of good points" is probably technically grammatical but it's an awful sentence. "This post made good points" works better. Better still would be getting more specific.
This post comprises good points.
This post consists of good points.