| From what I heard on the forums, this is only a problem for the human empire. It still doesn't make any sense to me though, I don't understand why humans ship crews would be unable to figure out how to refuel and keep moving. |
They can refuel and they can keep moving - just at sublight speed. Node lines run between planets. If you run out of fuel, you drop out of the node line. And you can't jump back in because the line begin and end at planets.
So for humans, you have to make sure you:
1) Have adequate range
2) Adequate fuel
FYI, you can set it so that ships automatically refuel at planets when they arrive.
However, that leads to problems - what if you didn't want a particular ship refueled by a particular tanker - maybe you wanted the defense fleet refueled while holding the colony ship. Or vice versa. So no matter what the developers chose as the default, someone would complain (see it's not as easy as you think when making a game, is it?

). So they set the default as the one giving you the most control. But you can choose to make it automatic if you want to. You have a choice - just make sure you understand the consequences of your choice.