"I'm sorry, you cannot return this jumper you bought online because even though it doesn't fit you, you've already decided to buy it and all decisions are final".
No one wastes their vote voting tactically, everyone gets their voice heard, and we get to choose exactly how we shoot ourselves in the foot when Leave wins a 2nd vote.
I mean how could Leave lose? It was the will of the people, they'll clearly vote the same again. /s
Better than the current game of 3d chicken we're playing right now.
With the referendum it's more justified. There were financial irregularities which would have rendered the result void but the vote was non binding so the Electoral Commission advised it can't intervene other than to fine some of the guilty.
Even the 2016 EU referendum wasn't the first we've had. As the voting populous grows old, new voters come of age, and the relationship with our EU partners change, it makes total sense to revisit past decisions.
Nothing in democracy should be closed to re-evaluation for all time in the future just because some people made a vote once.