Obsessions motivating "all actions"

[VIVIT]

As written, the Obsession disadvantage seems a bit odd. It has a diegetic description, and it has mechanical effects, but the description has a lot of details that don't seem to follow from how the disadvantage actually works, and have some pretty weird implications for roleplay. Bold emphasis mine, italic emphasis sic:

Originally Posted by B146

Your entire life revolves around a single goal. Unlike Compulsive Behavior (p. 128), this is not a daily habit, but an overpowering fixation that motivates all of your actions. And unlike Fanaticism (p. 136), this does not necessarily imply a set of philosophical beliefs.

Right from the start we have verbiage characteristic of
the "kooky nutcase" type of disadvantage that dictates characterization and derives its point value from reaction penalties that result from the behavior it leads to. The next paragraph begins with a statement that, seems to describe a something really extreme:

Originally Posted by ibid

You must rationalize all of your actions as an attempt to reach your goal.

As written, this suggests that even basic survival behaviors like eating and drinking must be justified with "If I die, I won't be able to achieve my obsession," or the like. That sort of thing is, quite literally, insane, and appropriate only to a relatively narrow range of character archetypes. But the mechanical meat of the trait is a lot more general than that:

Originally Posted by ibid

… Make a self-control roll whenever it would be wise to deviate from your goal. If you fail, you continue to pursue your Obsession, regardless of the consequences.

Here the text makes it clear that it's not really about what you're like as a person so much as about the way that the obsession restricts your choices and potentially interferes with other interests, like Greed, Curious, Selfless, or even social disads like Duty. And the paragraph on point cost says this:

Originally Posted by ibid

If your Obsession causes others to react badly, take Odious Personal Habit (p. 22) or Delusion (p. 130) as well.

Making it explicitly clear that obsessions do not come with general reaction penalties!

How do you interpret this disad? The bit about the obsession needing to motivate all of your action for to me like ungeneric fluff: Without it, the disad becomes a fill-in-the-blank character motivation in the form of a long-term goal that requires an SC roll any time you want to take a course of action that interferes with or sets back this goal, passes up an opportunity to make major progress on that goal, etc.