Of course it is. How can one advocate for something if not in a political sense? Politics can be defined as is the process and method of making decisions for groups. So to advocate for something, you are speaking as/for a group (in most cases). But stating that advocacy *is* politics applied to a government is an overstatement.
What goes on here, on these forums, is NOT advocacy in my opinion but rather a discussion (or lack there of) of things that can be advocated for. We all have the same *wants* for the most part. So how can you advocate to someone who wants the same thing?
What I see going on in here is... well... well it's not advocacy!