WHY ?

Because:
1. Not everyone has  ALL the answers.
2. Not everyone is single or alone and has plenty of time on their hands to be proactive in anything and everything
3.  Most of the questions come up months in months out  ( a search will give you what is being asked and what has been the outcome)
4. Most are expats ( newcomers like you)  and are trying to sort out things and also learning as months go by.
They don't "act dead" if they are reading these posts and instead of either going on a tangent or give inaccurate info, they just hope that someone else more informed  or interested will volunteer an answer.

As far ads or housing or jobs or  associations/meeting/lessons or clubs, there are classified section for that. This is not a social network per se.
Just my $0.02