You argument is valid - I did not deny that. It's just not on subject with this thread, basic netiquette. (And please don't make me feel old saying you've no idea what it is... I'm not THAT old!)
It's also not necessary to quote response that you directly reply under - do you always repeat what someone said in a conversation one-on-one, a second before answering them face-to-face? I would love to see that...
Anyhoo, to answer your question: it's not about why I need to colonize a far distant system (is there even close distant one?). It's just simple logic, at this stage: who colonized Colonia and how? I don't see rosary of settlements all the way from Sol to there. So if they did it, it's possible, therefore 10Ly limitation is arbitrary and can be changed to whatever.
I'm just like that. If what's already in the game flies in the face of later-introduced changes, creating paradox, then I see absolutely no reason to take it at face value, because that's a poker face with a concrete-floor-thickness make-up on it, that tries hard to not laugh.
Still, in one of my earlier responses I have displayed my opinion that this 10Ly value is likely for beta-testing only and we may see its reiteration when it actually goes live, so we all may be wrong about going to jousts about it.