When it comes to an actual election. Sure. If you don't vote you go with the new government. But when it comes to a non binding referendum in my opinion not voting can be equalled to accepting the status quo.
Why should an elected government listen to a 17% minority when it comes to international policy?
I get the broad concept of a "the status quo is the default" you're going with, but to me that doesn't change the base concept.
The question was asked, the majority said yes. I guess I just don't see what "Okay but that was only the majority of people who bothered to vote" changes.
I mean "Didn't say anything doesn't get a say" is sort of self defining isn't it?