Well, Mac, when I do something and it works, it's a fact. Until it's actually been done, it's an opinion and best kept to one's self or clearly labeled as a mere opinion.
I got into casting like most folks do. It let me get in a lot more shooting for my limited funds. At first, I was casting mostly for pistol, and my inadequacies as a pistol shot masked my inadequacies as a bullet caster. I got extremely lucky and my first try at loading for a Marlin 1894 carbine was a howling success. From then on, I knew that it could be done and it was just a matter of finding how to do it.
Along the way, I found out that my cast bullets would let me do things that jacketed wouldn't. Shooting for 3 cents a pop is a major one. Hunting small game with my deer rifles is another. Shooting in a large lot subdivision without outraging the neighbors is a third. The fourth reason is that it let me shoot guns for which bullets are not readily available. For Handi shooters, the .38-55 Target Model is a prime example of that. A fifth reason is that I am never gonna run out of bullets.
Contrary as I am, I also derive considerable satisfaction from doing something that people tell me can't be done. There is also a considerable satisfaction in doing it all yourself. It's like the satisfaction in handloading, but more so, for me at least.
Cast bullet shooting is not for everyone. You have to be or want to be a high colume shooter to consider it. It's not for folks with magnumitis. It's not for folks with more money than time.
But for the fellow whose taste runs to .30-30s, 357 Mag., .44 Mag., .45-70 and so on, and who shoots more than a thousand rounds a year, casting is something to be considered. He can match factory performance in those rounds if he wants to and he can shoot much more cheaply and quietly if he wants to. And just because he shoots cast for most of his shooting, he does not need to use cast for hunting. All it takes to switch back and forth is a good cleaning and sighting in. You may even be able to skip the sighting in.
The fellow who has a reason to shoot cast should not be discouraged from doing so just because he shoots a Marlin or an NEF. They have their quirks, but once those quirks are learned, they shoot cast bullets as well as anything else will.