Absolutely correct. The gun and handling it have to be right for YOU no one else !! I started out with isosceles which for me was faster and more accurate. Now with a permanent elbow injury it's a isosceles/weaver mix !
One advantage we have is that more and more guns have interchangeable grip pieces to better fit your hand !! The fit should be so that you can close your eyes raise the pistol and you should be close to right on. Get instruction but not one who says THIS is the right way .Everyone is different .Find what's right for YOU.
And Watson , bring your revolver !