I am quite new here so I may missing something obvious, however I have quite a bit of experience from the technical communities (Ask Ubuntu and StackOverflow). Therefore, I try to understand the best way to use this site by relating to what I already know.
This is confusing me a little bit. In the other sites of the network, answers posted as comments (and vice versa) are absolutely discouraged and get flagged routinely. I know because I have review privileges on Ask Ubuntu and I have read the policies of the various communities.
However, here I see many questions which do not have answers, just to find out that a user (usually with a medium/high rep!) posted the answer scattered in a couple of comments to the question. As far as I understand, this is against the policies and the "format" of this network.
My question is: why do they do that?
Bonus questions: what should we do to stop them? Is flagging comments a viable solution?
For now I left a comment in a couple of cases, like "you should write that in an answer" but I don't think I will be listened.