Most people who are focused only on understanding sexual/romantic dynamics well enough to get a girlfriend they're happy about being with will dip their feet into the community for a few months or a couple years and then disappear. It's the perpetual failures, and more importantly the people with a political agenda, who stay.

Well, you're certainly right that the people who stay in the community are likely unrepresentative of the average. But there are many people who stay because they're seeking to be PUA wingmen/coaches (either amateur or paid-for), or simply to improve their outcomes and their understanding of seduction- and social dynamics. To some extent, this describes 2007!Roissy and 2007!RooshV too, but even then they were quite controversial and 'political', in a way that many others in the community would have found distasteful and unhelpful.

The flip side of it though is that if the 'heavyweight' political folks are right about what they infer from PUA micro dynamics (I'm far from convinced about this, but we can assume it for the sake of this argument) there might not even be much need for further work on the micro side. Overall, PUA has seen remarkably little change since 2007, though there's definitely been a welcome emphasis on 'inner game' and 'being a natural' as being the next level, and low-level tactics and tricks as useful training wheels that can eventually be dispensed with to a large extent.