Of 12 posts in that thread, 6 were "me too" posts, or replies to "me too" posts, and another 3 were the moderator trying to instruct people to start their own threads, for their own problems.
One post was the OP, one was the moderator's original reply,and one was the OP's response.
When 75% of the posts in the topic are unrelated to the OP, how can the OP reasonably expect to resolve his issue? Closing that thread was absolutely the right thing to do.
And as long as people continue not to read the Forum instructions regarding how to post quality topics to help ensure the most efficient possible resolution, forum volunteers do the right thing by posting copy-pasted replies, designed to cut to the chase.
A quality OP, that helps volunteers resolve an issue, will state what the problem is (what the OP expected to happen), what the OP tried, and what didn't happen as expected and/or what happened unexpectedly. Additionally, a quality OP will indicate that basic troubleshooting efforts have been exhausted, including (where applicable) changing the active Theme to the current core-default Theme (i.e. Twenty Twelve), disabling all Plugins, re-enabling Plugins one-by-one to identify a potential culprit, hard-resetting the Plugins folder, or even re-installing WordPress.
This is especially true when, as Otto indicated, forum volunteers know that, 90% of the time, a given problem is Plugin-related (as with media uploader/jQuery issues).
And I should point out: forum moderators here generally become moderators because they are the most-active volunteers, who have contributed the most to the forums. So to refer to a particular moderator as being "of no obvious significance" is a fairly ignorant statement, and one that is inflammatory and of dubious efficacy in effecting any sort of change.