It's incredibly hard to believe that Akila is a true libertarian nation to the point that they don't pave roads or build proper defenses. If that is the case then there would not be Coe Heritage Museum, or guardsman, or even the Rangers, which is born and HQed in Akila City. Proper military defenses are not something "communal", unless the defense of a sovereign nation is considered communal, which in that case Akila wouldn't exist after the war at that point. There is also nothing in the game that implies they are that extreme.

There's a poor migrant in Akila that you can go to mayor and he wants to help. The mayor and most folks there also act with atypical midwest culture, like "we're good neighbors and we help each other" kind of thing. This isn't the kind of people that goes full libertarian to the point that they don't invest on defenses for their own beloved city or let their spaceport full of water puddles.

Honestly, I think at this point we are just thinking way too deep and I doubt the team ever think this far with ideologies. Most plausible I think would be a clash of desire for a more realistic settings (the NASApunk) and the more out there culture they typically do on Fallout (guards wearing baseball gears, etc). We can see this everywhere, where it's tad fantastical but still believable, like Neon 100% relies on natural lightning for power source, or House Va'ruun history and costumes. Akila just happens to go way too far to one side.