Sure, but we already know the long term effects of diabetes and high blood pressure, and they are awful. By waiting to see, you are explicitly choosing to take

Sure, but we already know the long term effects of diabetes and high blood pressure, and they are awful. By waiting to see, you are explicitly choosing to take those long term effects in an attempt to avoid the unknown long term effects of the new drug. Obviously, it might be that the long term effects are worse, but we shouldn’t act like waiting is a zero cost choice.