The alpha/beta dichotomy (or alpha/beta/omega trichotomy, to complicate things a bit) strikes me as oversimplified, but the inherent simplicity is in many ways a feature rather than a bug. It facilitates the perception of a state of ceteris paribus in the reader that allows him to evaluate behaviors in a vacuum, the prescribed ones being characteristic of alphas, the proscribed ones being of betas, and the absence of any behavior at all being of omegas. Casanovas can still make bad moves and Aguecheeks are capable of making good ones. Making said good moves and avoiding bad ones is the primary pedagogical purpose of Game blogs, Roissy's being, in my estimation, the creme de la creme.
Digressing aside, beyond the difficulty in treating the terms as nouns given that they function better as adjectives, that's not exactly an accurate characterization. To the contrary, I've merely pointed out, while granting and subsequently employing Game terminology, that betas appear to do a better job passing along their genes than alphas do. Game philosophy is essentially existentialist and nihilistic, so the thought of avoiding ungrateful spawn to tend to and pay for shouldn't upset guys like Roissy, who would rather sit poolside than change diapers. Hard to deny that there's a lot of appeal to aspiring to such a lifestyle. While you may not care about reproduction, though, reproduction cares about you.
Conservatives, broadly defined, however, tend to operate on different premises. Bringing Jonathan Haidt's Moral Foundations theory into the mix, they put a lot more emphasis on the loyalty/betrayal aspect of morality than do PUAs, who tend towards liberalism (for a fuller profiling of alpha demographic characteristics, see here), and what could demonstrate more of a disregard for loyalty to one's own family (or nation, which
Another dimension of morality that is close to the hearts of conservatives but held in lower esteem on the left is that of authority (the absence or undermining of which is subversion). Game operates on the premise that men should insinuate higher status than they are due, obfuscating the social order and creating a free rider problem, the societal costs for which betas must bear. Fake it until you make it. Maybe. Or more realistically, just fake it, period. Game is a way for guys who aren't where they'd like to be in terms of "money/looks/fame" to be (optimistically) or to convince themselves (cynically) that they are at least on par with, if not superior to, those who have more money, better looks, and greater fame than they do.
Beyond differences in moral perspectives, the prescription that every man can be king (which, in fairness, Roissy has tempered on multiple occasions, though it's often lost on his legions of commenters) seems to be at odds with biological realities (link via Ray Sawhill).
Game is founded on the premise that female detection mechanisms that have been honed by selection (natural and sexual) throughout human evolutionary history do a pretty crummy job at what they're commissioned to do. The degree to which they fail is open to debate--and as aforementioned, Roissy's assessment is more attuned to reality (they do an okay job, but they're far from precise) than those made by some of his more zealous minions (they basically don't exist)--but it's axiomatic that they are significantly flawed.
This is in contrast to the detection mechanisms of men, which are far more perspicacious than those possessed by women are. Science has thrown a few wrenches into man's well-oiled machine with plastic surgery, breast enhancement, and the like, but prior to World War I, women were almost powerless to do much of anything to influence male detection mechanisms.
Finally, it's unclear to me why alphas should despise betas, since more betas means easier pickings and less competition for alphas (not to mention the fruits of civilization more generally), yet they seem to, quite viscerally. On the other hand, it's easy to see why betas should despise alphas.
Tangentially, Roissy should survey his readers on their political leanings. He's commissioned interactive polls on multiple occasions in the past, and while he's part of the dark enlightenment and presumably wouldn't self-describe as a leftist in any way, I'd suspect that he's to the right of most of his readership.