I like THR layout as is. So I agree with you. I learn a lot reading about reloading here. Many knowledgeable people here.I’m going to respectfully disagree with OP’s premise. This is my fav reloading forum specifically because there isn’t a separate casting section from the reloading. I have learned more about casting ‘incidentally’ reading threads that started out about a different topic or are ‘mixed’ in like this thread of yours. It was enjoyable to read and learn from; I’m both glad you started it and glad I didn’t miss it in another section.
I view casting as just another level of hand loading. It lowers the barriers to entry in knowledge and time to make your own ammunition with store bought bullets that are known to be good for caliber with recommended powders and makes the hobby more accessible to some of us or people living in apartments, etc. However, it’s normal to then get into experimenting/perfecting as you become more knowledgable. It’s kind of like starting with a lee loader, then a single stage, then a turret, then a progressive press…. I’ve even enjoyed reading about the Magna and other automated, commercial casting machines even though I will likely never own one or even see one.
The more experienced loaders and casters here aren’t off in the secret back room where us newbs aren’t privy to their passion and knowledge. The hobby and THR will take you as you are, but also take you where you want to go.
TL;DR: THR’s reloading forum is great as-is. Mods and site-staff shouldn’t mess with what is working.
And as for casting, it is a whole nother rabbit hole. I joined castboolits.com back in early 2020. There is so much info and knowledge there that my mind gets boggled in reading.
Both forums complete the other in my opinion.