This is a referendum that changes the fundamental rules of the game, not a pizza order. The onus isn't on the population to waste their time vetoing your bad or mediocre ideas, it's on you to come up with good ideas. And disgusting your constituents enough that they abstain entirely should very much not be a viable strategy. If you want to change the constitution, you gotta convince people that you're doing something good, including those who are hard to convince. That's literally the entire point. If you're not managing that, clearly your change isn't good enough to make.

Anyway, I wasn't even trying to argue in favor of this position, or against it. I was merely replying to the parent comment that Brexit did not meet the threshold that their parent comment had suggested.