Randomized controlled trials are great, they are incredibly certain to be right.
But experience has a whole other quality, it is much less reliable but a whole lot more comprehensive. An RCT can only measure effects on what can be used to select a large group of people. It cannot measure the effects of a weird anomaly that is recorded nowhere. Meanwhile experience can extrapolate from a very few examples.
So it is not at all obvious that we should favor RCTs over experience. Because they have very different things they can measure.
So it is not at all obvious that we should favor RCTs over experience. Because they have very different things they can measure.