Think of it as a sidewalk full of angry midgets (midgets are electrons). The midgets walk down the sidewalk, and every 2 seconds, each midget has an uncontrollable urge to punch a lightpost (the lightpost is the wire). If there is e liquid in the lightpost, the punch simply turns the e liquid into vapor. If the lightpost is empty, the lightpost bulb glows.
The part of the street passing through Downtown Wickville has lightposts being constantly restocked with e liquid. The bridge from Wickville to Positivepostown has lightposts with no e liquid ever.
Really? You have two photos showing the exact same thing and you're refuting the photographic evidence with hypothetical midgets and light poles???