I actually appreciate your point a lot more than it probably seems like I do (not counting the rude bit, which was out of place and wide of the mark). The counterargument only becomes compelling when you start to think practically about the effect snark etc. has on online communities. This is an externality, so it is easy to overlook and not always in the interest of individual actors to take care of.
We could compare it to a company that makes a good product (in this case, a good point about funding and the politics of research) while polluting the local environment (the community here). The solution isn't to ignore the pollution, nor to justify it.
Fortunately for all of us, it's not only possible to make the product without polluting, but the product comes out better when one does so. But this doesn't happen by default; the default is the opposite. That's why I post moderation comments, at the cost of off-topicness. In the long run, the plan (and the unsolved system design problem!) is to get the desired effect without posting such things, which are as tedious to write as they are to read.