Walter Sobchak respects the rules. He quotes Vladimir Ilyich Ulyanov, and knows when a rug ties a room together. He's a Vietnam veteran, a bowler, and a Polish-Catholic turned Jew. He once dabbled in pacifism (not in Vietnam of course).
He'll dive out of a moving car, single-handedly beat the shit out of 3 nihilists, knock over a crippled guy's wheelchair, and he'll get you a toe by 3 o'clock - with nail polish. There are ways. You don't want to know about it, believe me.
Walter Sobchak is a Man Beard.
Which isn't to say Walter doesn't have flaws. But unlike that phony Kenny Rogers, Walter's weaknesses flow from his Man Beard characteristics. Yeah, he dog-sits his ex-wife's Pomeranian, but he sure as shit doesn't fucking roll on shabbos. He might be living in the past, but at least it is a past with 3000 years of beautiful tradition from Moses to Sandy Koufax.

To put it into Man Beard terms, Walter's failure to put that woman in her place is because of his irrational exuberance. He's a little bit crazy. But that is what makes him such a potent Man Beard. Would a sane person brandish a firearm to resolve a bowling dispute? Or take a crowbar to a sports car to teach a punk kid a lesson? If that same irrational exuberance leads to him occasionally taking care of a fucking show dog with fucking papers, so be it. It's all part of his sick Cynthia thing.
Walter Sobchack's Man Beard says:
"The chinaman is not the issue here, Dude. I'm talking about drawing a line in the sand, Dude. Across this line, you DO NOT... Also, Dude, chinaman is not the preferred nomenclature. Asian-American, please."
"Lets not forget Dude that keeping wildlife, um... an amphibious rodent, for... um, ya know domestic... within the city... That ain't legal either."
"Nihilists! Fuck me. I mean, say what you like about the tenets of National Socialism, Dude, at least it's an ethos."
"Donny was a good bowler, and a good man. He was one of us. He was a man who loved the outdoors... and bowling, and as a surfer he explored the beaches of Southern California, from La Jolla to Leo Carrillo and... up to... Pismo. He died, like so many young men of his generation, he died before his time. In your wisdom, Lord, you took him, as you took so many bright flowering young men at Khe Sanh, at Langdok, at Hill 364. These young men gave their lives. And so would Donny. Donny, who loved bowling. And so, Theodore Donald Karabotsos, in accordance with what we think your dying wishes might well have been, we commit your final mortal remains to the bosom of the Pacific Ocean, which you loved so well. Good night, sweet prince."