Range bands are an abstraction representing more than just "distance from me at this precise second in time." They are used to measure how much effort is needed to move from point A to point B, just as they are used to determine how far a ranged attack can reach or how loud someone might need to speak to be heard.
If I could be allowed an explanation by way of a couple illustrations...
Combat rounds are an abstraction. Combat rounds, and turns, vary in length of time. They can last as long as a minute or more, but they have no set duration. One person's combat round might be cinematically much shorter than another's. They're gonna look different.
Wounds and damage are an abstraction. Just because someone has received "wounds" does not necessarily mean that he is bleeding or that he was even actually "hit" in the narrative. 10 wounds on one PC is could well look much different than 10 wounds on another PC.
...range bands, like combat rounds and "damage taken," vary in definite narrative measurements, because they are not drawn with hard lines. Here's the deal: in no combat ever are characters going to make their shot and just stand there like a lemon waiting for their enemies to take their turn. It's all fluid, back and forth. I'll do my best to narrate blaster bolts flying back and forth during each of my PC's turns, for example, just to highlight the abstract nature of the combat turn. The world doesn't stand still while you make your combat check. The game mechanics are there to give you a sense of all kinds of possible factors that could influence the outcome of the action you're taking.
I'll point you towards the beginning of the Range Bands description in the CRB, and highlight words such as "broad terms," "abstract," "action," "general," "dynamically." They even go so far as to call out Rule 0, and that "exact distances in meters do not matter," and that the important things are vivid images in the player's heads and that the GM can quickly provide mechanical information they need.
TL;DR:
This ain't grid-of-squares, tactical-miniatures-gaming. This is cinematic gaming. This is Star Wars. And Star Wars is nothing if not inconsistent and abstract ![]()

