Brexiteers blocked their ears

Listening to the further complications anticipated post Brexit re airspace problems etc, isn’t it time Brexiteers stopped putting their fingers in their ears & actually faced up to the facts that Brexit is going to be have a negative & devasting effect on finance & employment for many years to come instead of their continual asssertion that life post Brexit will be a land of milk & honey. John Major today says that some regulations could take up to 50yrs to unravel ,so a lot of us of a certain age won’t be here by then ,what chaos will we have left for younger generations to deal with. is it not reasonable to to think a 2nd referendum is in order.