I guess I am among those who understood "colonization" as a process of settling outside of already-settled system, or the bubble.
In the end - and I have not checked - how many uncolonized system are there in the bubble? If you switch to power play view in the map, there don't seem to be odd black bubbles of no alignment towards any major faction, so it was my understanding that every system within inhabited bubble has a population with alignment towards this or that power. But as I said, I haven't checked.
At this point in my post I wanted to say that maybe we should hear from FDev about their vision of what colonization is about, whether it's a tool that anyone can take to shape the galaxy however they see fit (including creating settlement far outside the bubble and just about anywhere unclaimed), or whether it's more PP-oriented activity to occur within the bubble. But once again, I get the impression they themselves have no actual finalized vision of it, because otherwise why not clearly sharing 10Ly as a test setting that they'll expand in the future to allow for what we want, even conditionally? I guess I shouldn't be surprised...
For colonization outside the bubble I don't say we shouldn't have it at all but even if 99.9% of players have a kind of cooperative mindset in Elite, the 0.1% are the problem who will squat in Beagle Point, Veil West Nebula, etc. and attract gankers who find it a joy to attack an exploration ship.
And what do you base your presumption on, as well as why do you perceive it a "problem"? Does it really require - after 10 years of existence - to keep reminding people this game can be played however one wants?