When someone removes a Chesterton fence without thinking about it much, what usually happens is that after a while people begin to see that there was a reason for the fence to be there. That doesn't necessarily mean that they have to put the fence back, but they do have to develop a new way to address the issues that were meant to be addressed by the fence. I expect this to happen over time with the fences that have been taken down in our current system (i.e. I think that those fences did have their reasons.)
In my experience, that's not what usually happens.
Where are you getting "that's what usually happens"?
Chesterton's meta-fence: "in our current system (democratic market economies with large governments) the common practice of taking down Chesterton fences is a process which seems well established and has a decent track record, and should not be unduly interfered with (unless you fully understand it)".