I didn't downvote your answer but I would imagine because all you posted was links to something off-site. Link only answers are frowned upon and rot over time because links go bad. Answers should be detailed, include the needed or recommended code and be able to survive years to come. Your answer doesn't do that.
I would imagine if you made an edit ...
These are different things, regardless of reputation level.
closing is expression of being unfit to the rules of the stack
voting is expression of [perceived] low quality
commenting is discussion in general
There is often some correlation. So question can be low quality (downvote) and out of scope (close). However it's not causation — it can also be ...