Before starting, take into account that my English is going to be awful XD.
I think you are appliying a very restrictive policy when considering if a question is too subjective or not. You must also notice that some stackoverflow moderators redirect some users here when the question is not concrete enough there. So this is the place where questions that are subjective to a certain degree should go, otherwise we would have a clone of stackoverflow.
There are a lot of people scrambling to be the first to denounce a question as subjective, substracting points, and when that happens it influences other users to do the same. On the contrary, if the first votes are positive, the tendency is to add more positive points or let the score as it was.
I've read a lot of questions here that are more subjective than the one I asked (and was closed), and these have, however, a high score since they are considered useful by many people.
Please, don't close a question so quickly if it has been aswered, wait a minimun time (2-3 hours) to see what happens. Because the first 3-5 answers may be really helpful and then you can close the thread if you want.
If someone is interested, my question was this: https://softwareengineering.stackexchange.com/questions/101451/best-programming-language-for-native-application-development
Maybe I shouldn't have used the word "best".