Thanks for pointing these questions out! :S As I read through the first cited query, I don't find it to be about worldbuilding at all. It's basically a plot generation question. (It is also opinion based, but 94.7% of all questions in this forum are opinion based.)
As I read through the second cited query, I don't find it to be about worldbuilding per se either. It's not really long enough or detailed enough to determine if you're working on a story or if there's some other reason for the question. It's very vague and thus far too broad and also opinion based. Basically, almost any element can be cited as "the most important" with some validity.
The long and the short of it is that Worldbuilding.SE doesn't really deal in either kind of question as a matter of practice. What we mean by "worldbuilding" is that we field questions about systems --- how worlds and the phenomena in them work. You could easily alter your question to fit the needs of a particular fictional world, for example.
I'm sorry your question got downvotes, but I'd chalk that up to a combination of it being a low quality question (lacking detail, lacking focus) and also not pertaining to the forum's goals. The other is just an example of a query that is engaging and interesting and that generates feedback, but is no more appropriate to the forum than yours!
I voted to close your question as being too broad. Once you hammer out the details a bit and bring it into focus (which element is most important given XYZ conditions). I'll most happily retract my VTC! Or else vote to reopen, if it gets closed.