You shouldn't discuss politics and economics in a thread on the mailing list, but if it is related to a proposal, I don't think it should be moderated.
"Generally discouraged: non-technical bitcoin issues"
I believe banning issues of politics and economics from development of a consensus and money system is going to lead in misguided directions where cryptographers design systems they don't understand and that are inherently not robust and flexible. Furthermore it leads to two separate communities - developers and the rest. Most of what's going on at the moment has to do with this. The social architecture doesn't work all that well. Most Bitcoin companies don't contribute to core, and core doesn't care about Bitcoin companies and users.
Keyword "Discouraged" not banned. You can still discuss it there, it just isn't entirely wanted but if it is relevant to the topic at hand, I don't think it will be moderated. Again, they are doing a review of the moderation policy, since you clearly have a problem with it, please bring it up and discuss it on the mailing list, not here. They aren't going to see it here.