Sure. Let’s leave with no deal, no forethought to the fact all flights to & from the UK do so by EU regulation, no care for the millions of people whose right to live & work where they do will be gone, no worries for the goods at the border that suddenly won’t be able to cross. It’s not like we can’t easily replicate the various European agencies or sort out new aviation regs, pharmaceutical protocols, banking regs, deal with the return of pensioners and suddenly unemployed people needing to return to the UK, or sort out the 759 new trade agreements.