Earlier quoted context omitted.
>Okay, he answered top voted questions at the time Well, for example, he was asked if he'd consider raising the budget for NASA, his answer didn't directly respond or answer the question, just re-quote his campaign piece on the issue. He didn't answer if he'd consider raising the budget, he just gave some purposefully vague reply about the notion that "we should stay at the forefront of space exploration." >There wer…
So your complaint is the POTUS should've come to the AMA with more time to spend, hunted down "better" questions to answer, and then spent more time thoroughly answering the questions. Someone else's complaint is going to be, why is the POTUS wasting his time and our tax dollars with reddit? Someone else's complaint is going to be that reddit's lucky POTUS gave them any of his time and that reddit was not appropriate…
You clearly are not reading the subtext of what (s)he's saying, or you're willfully ignoring it to appear steadfast in your dissent: it has been admitted and acknowledged that the POTUS had a limited amount of time with his interactions on Reddit. The complaint is that the answers given were reiterations of campaign points and political tent-poles.
The President took a unique and unheralded opportunity to interact with the voting population in a highly interactive way, and demonstrated a familiar ability among politicians to respond to a question without actually answering it. As citizens and by proxy a community that represents a base of voters likely to support a president keen on engaging his constituents on topics they're overtly concerned about, and responding to them in a fashion they find most accessible: he failed on both fronts. This is frustrating. This is our problem with Mr. Obama's appearance tonight.
"Time", which you seem so fixated on is not our problem with the President's appearance this evening; his lack of at least initiating a dialog by providing politically safe answers is.
Here, cliff notes-as it appears painfully obvious you have not even read the AMA itself: http://news.ycombinator.com/item?id=4451556