Your argument seems like saying, "Look, everyone said that the Y2K bug would cause terrible problems, but nothing happened."
Nothing happened, exactly because everybody was predicting terrible problems and so they fixed the bugs in advance. If people had been following your idea, they wouldn't have bothered to predict any problems or to fix the bugs, and it could easily have therefore caused terrible problems.
It's more like saying "look, everyone said pricing sulfur dioxide would cause great problems, but nothing really bad happened, because people and the market adapted naturally to the change".
So the Y2K bug is not an argument for "do nothing if you're heavily involved with computers", but it is an argument for "do nothing if you have no connection with the computer industry (including funding, etc...) because it seems to have a decent track record of sorting out its own problems".
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)".