I work with dogs and have done for a long time. I am not generally intimidated by dogs, even badly behaved ones (of which there seem to be far too many now - thanks lockdown!) but I am unnerved by XL Bully's.
A large reason behind that is the people who buy them. I am not saying 'it's not the breed, it's the owner' but I do think that someone, out of every type of dog / mixed breed decides that something of that size, strength and potential intimidation is a good choice. While any dog can bite, and do a degree of damage, these dogs are a serious issue as the damage they cause is extreme due to their size.
However, will banning them just create another 'problem dog'? I have a horrible feeling it will. Would it make more sense to make the owners wholly liable, or even imprisoned, if their dog attacks? If there is a massive fine and or much much tougher penalties, would that make more of a difference than just an outright ban?
I fully support neutering the current XL's there are now, but I am not sure that can be implemented enough, and I am also not convinced that a lot of the people with these dogs would like particularly fussed about the muzzle / licence and training properly angle either.