Well... yeah! Just because they manage the internal continuity to maintain its consistency, it doesn't mean that this continuity doesn't matter at all. Your point actually goes in support of the EU: they keeping it consistent, patching the holes and fixing mistakes - why would they bother if it was just some alternate reality from which you can pick and discard as you choose? The EU is one huge consistent chunk of material: you either embrace it all or ignore it all and limit yourself to films only. But if you do that, why do you care about our canon discussions in the first place?