I think you're over analyzing.
Sub / dom relationships are a total fantasy, no matter how they are carried out. The dom is only a dom at the submissive's consent. At any moment the sub can rescind their consent and that relationship is no longer.
It's no different than in any more "typical" vanilla relationship when a woman ties up a man during sex, or a man blind-folds a woman, out of a sense of adventure. Or if a woman screams, "FUCK ME HARDER NOW MOTHERFUCKER!" The principle is the same as sub / dom relationship, only more intense in a sub / dom relationship.
The bottom isn't totally submitting. That's not possible with free will. In that respect, it's just a very intense game of role playing, where the sub is free of all care and responsibility by throwing away their need for self-control. They are titillated by the unknown more so than the idea of being controlled. They want to be pushed to their limit.
A dom has to work to keep his sub happy just as much as the sub has to work to keep the dom happy. If the the dom doesn't do a good job in their role, they are kicked to the curb.
My wife once dated a timid girl. One that told her she'd push her to her extremes in an endless chain of emails. But, in reality, she wasn't up to the task. My wife was polite about it, but she ended the relationship because she wasn't getting what she wanted.
There is no "absolute" submission. It's certainly not submission in the way that women had to in the 1920's to their husbands. Knowing your sexuality and picking the right person to push your buttons, is a very empowering act. The sub is choosing to be led around. The sub is choosing to be exposed. The sub is choosing to be pushed to their extreme. There's no timidity in that act. It's bold and very liberating.
The irony is I, as the dom, serve at the pleasure of the sub.
Now about your comments about an alpha male.
What in the great googly heck says that alpha personalities and liberty loving are mutually exclusive? Or am I interpreting what you're saying incorrectly?
Alpha =/= control freak.
There are plenty of people of each and every personality type who are liberty lovers. My personality type is determined by me genetic make-up, my environment and my nurturing. This does not prevent someone from discovering the ideas of liberty and embracing them. This also does not mean that if you're an alpha, you must try to change who you are to "fit in" to the liberty lifestyle / movement. That would be decidedly opposed to the philosophy.
Embrace who you are. That includes both your positive attributes and your flaws. Use both. What determines whether or not you're a true liberty lover is how you treat others.
Methinks you're trying to, too neatly box up and package what liberty loving means, in ways that are ill-fitting and unnatural.