The question itself may not present any content but the discussion it has started has already created some.
Also, the thread currently has 70 points. Clearly, some people are interested in it, which I think, invalidates your assumption that the thread is pointless.
I really cannot see why you needed to flag it.
Also known as the 10% effect. See point 1: http://mattmaroon.com/2010/11/23/i-quit-hacker-news/
That's exactly the reason I flagged it. I don't want such stuff on the front page. It's extremely boring.
Lack of the ability to downvote definitely cripples the way to represent the opinion of the community about a specific thread. Considering that, your argument makes sense but my point is, flagging the thread will make absolutely no difference as long as there are a significant number of people who show interest in it.