I’ve heard a range of politicians say that we must go through with Brexit for fear of the damage that would be caused by doing anything else. Their concerns include the betrayal that would be felt by people who don’t normally vote but were motivated this time, by people whose “Leave” vote was a vote against “the elite” and would feel let down if “the elite” avoided Brexit, and by people who would see any attempt at a People’s Vote as a betrayal of the 2016 one.
Logically, this doesn’t hold that water. We don’t see it as undemocratic to have General Elections every few years. Even Jacob Rees Mogg is on record as suggesting two referenda, with a second one to come after the renegotiation is completed (though he now seems to have forgotten this).