I just feel like none of the high rep users of this site are being content watchdogs, which is quite frustrating.
Acting as a "content watchdog" is not something that is strictly the responsibility of high rep users.
There are several tools available to users without sufficient reputation to vote to close.
You can (and should) downvote questions you feel are low quality.
If you feel a question should be closed, but don't have the reputation to cast such a vote, you can flag it for moderator attention.
Finally, if you feel the question isn't very good, you can try to edit it to make it better.
It is important to remember that not everyone will judge content the same way. It may seem like a terrible question to you, but that is a subjective call, not an objective one. While the low quality of the question may be obvious to you, it may not to others.
As has already been mentioned, General Reference is no longer a valid close reason. As to why it is still listed as an option, check the accepted answer to that meta question for more details.
Since you mentioned the FAQ, please note that according to the question linked in that faq, Google is not a valid reference site, so even if General Reference were still valid, this question would not fall under it.
As to why more people aren't acting on the question... I know I haven't voted on it simply because I'm not familiar with the show in question. Without knowing the context (how the dam relates to the show, the sci-fi elements, etc.), I am not going to downvote something simply because it is a short question. Neither am I going to upvote it. I don't believe this means I'm not "doing my job", but rather the opposite: I'm reserving my high reputation privileges for actions that I am confident that any decision I make will be informed.
Given that the show appears to be only 3 months old, it is not terribly surprising to me that not many people have voted one way or another.