This one is really pretty simple. It is a first principle of evolutionary biology – wherein it is expressed as “almost all mutations are lethal,” a fairly obvious truism when it comes to incredibly complex living organisms that manifest a truly spooky degree of thoughtful robust design. It has direct, immediate and palpable – i.e., painful – application in almost every domain of human activity. It goes like this: take something that is working pretty much, hobbling along from one day to the next without dying altogether, and then change it so as to make it work better according to your bright stupid idea; how likely is it that you are going to succeed in your project of reform?
Not likely, right? I mean, really: how likely is it that you will have thought of just what needs to be done with a procedure that has been cooking along for decades without your help? A procedure that has hobbled along from one day to the next for say 30 years is probably doing OK, mutatis mutandis. Mess with it, and you are likely to do no more than mess with it, at the very best.
So, in messing with it, you are almost certainly wasting your time.
So, hello, stop messing with things.