It's because remainers just cannot accept the result.
That is no answer Wally, just an insult and misinterpretation. I do accept that the vote was a comparatively small majority (in the scheme of referendums) to advise the government that we should leave. I would be completely blind, deaf and stupid if I didn't; it is a fact.
Your interpretation is another Leavers Lie as most people on all sides do accept that was the vote. It is also aggressive attempt by leavers to silence the other half of the country.
So we accept what the outcome of the vote was. So what? That simply does not, has never, and no one has offered one instance when it did, mean I, or anyone else, should not continue to challenge and try and change what is happening because of it. That is democracy.
Your definition seems to be that the outcome of this particular vote - no other vote has every been treated in this way - should never be challenged, could never be changed. That is the dictatorship of the majority not democracy.