The issue you raised is with a flag on an answer. Answers cannot be closed. Close vote reasons and reputation required to vote to close are not relevant.
You flagged an answer as "not an answer", suggesting that it doesn't attempt to answer the question. "Not an answer" flags may sometimes be processed by reviewers (with 2000 rep or more), but on smaller sites such as Magento, they are more likely to end up on a moderator's plate.
The moderator disagreed with your assessment of the answer. Indeed, it says in part
I would suggest you either take a look a Zend Z-Ray, however a quick solution would be to integrate this extension to see what call is taking the longest: https://github.com/AOEpeople/Aoe_Profiler
If I had to guess what the issue is, something is deadlocking in the database.
While tentative, this does look like an attempt to answer the question. If you consider this information to not be useful, voting down is appropriate - and you have reputation for that.
There is another line in the answer:
So I just tried it on a random demo site and it isn't increasing the site speed at all.
This shouldn't really be there: it's a commentary on another answer, it's not even clear what "it" refers to, and the link is dead anyway. Editing this line out would be appropriate; this doesn't require a moderator, since everyone can suggest edits.