I saw that, in general, questions like the one reported in the title are closed by community. I just cite one as an example: http://stackoverflow.com/questions/6548826/angular-js-vs-backbone-js

I also read this: http://meta.stackoverflow.com/questions/18950/should-best-features-software-etc-questions-be-closed which basically says that the focus of Stack Overflow is to get answers to programming questions.

But I saw that this is a general attitude of the community, not only on stackoverflow but also on other stackexchange portals, for instance look here: What are some good tools one can use for creating and maintaining an online CV?

So, as far as I understand, this is a rule of the community that any comparison question is closed. Am I right on this?

My question is why are comparison questions, especially on technology, closed?

They seem very useful to me.

Is there a 'right' place to post them or it is not at all the goal of stackexchange community to answer to them?