I'm not entirely sure how "meta" works, so perhaps this isn't an answer.
My personal opinion is that consistency is important. To a new user of LaTeX, the distinction between what is trivial and what isn't might be difficult to make. Thus, when confronted by a pair of questions similar to those above, it might not be entirely clear what is "acceptable" to ask and what isn't.
With that in mind, I think that absolute consistency is impossible. Certainly, the same question posed by two different users might be handled differently. Had the table question been a first question, then it likely would have received a different response. Rather, it was asked by a user that should have known better and for whom nearly half of their ~20 questions (many of which were basically the same question) had been closed for the same reason.
In addition a zero effort "draw it for me" question will often pose a more interesting problem than a zero effort "make this table for me" question. I hope that it's not presumptuous to say that most of us are here because we find solving these problems entertaining and/or enjoy what we learn from them. When something interesting comes along, it's hard to resist the temptation to try to figure it out...regardless of how it's asked. The large base of graphics users will naturally lead to more interest in the graphics variety of this type of question.
As an educator, I deal with people wanting answers handed to them without putting in any effort themselves on a day to day basis (kids these days). Most of my time is spent trying to convince people that seeing the answer is only really useful after having struggled to find it themselves. So on the one hand, I come from that perspective. On the other, I enjoy a good problem as much as the next guy and some of the few answers I've provided on this site are to questions that haven't shown any effort on the part of the asker.
In short, all of the people who answer questions bring different things to the table and have different motivations for doing so. That's what allows for such a great variety of answers here, but also what would prevent any unified policy on what "should" be answered from being enforceable and therefore useful.