I've seen this before, but I can't say I find it a compelling argument - if an institution was placed for good reason, then at least someone, somewhere would remember why it was placed and could give a compelling argument. If no one can do so, the risk of some, hidden drawback which the original lawmaker could have forseen seems too small to count.

I mean, this argument does apply when you are acting alone, on some question that neither you nor anyone you come into contact with knows anything about...but it doesn't apply to something like this.