Wrong. Weight is not a measure of quality, generally speaking. It's often a by product, at best. What other product do you ever buy where you go and want something heavier? When is it ever a true sign of quality? Outside of possibly gem stones and precious metal.
Outside of a cold feeling in some conditions you can't tell the difference between plastic parts and DC ones on an assembled figure. If they threw a metal bar in the torso and said it was diecast or charged more (or sand or anything heavy to add weight really) and didn't disclose what is metal most people that prefer DC could not tell the difference. And then when you factor in the materials used for DC are such cheap crappy metals it makes it less quality not more. There are almost no products that quality is equated to weight. Not in cars, TVs, stereos, phones, laptops, houses, toasters, shoes, clothing, art, furniture, food...there's almost nothing where weight (especially as by itself) is considered quality. What makes something high quality has nothing to do with weight. As I said, at best it's a by product.
My entire point is that it's a gimmick. Outside of a weight there is in fact ZERO benifit to a part being DC over plastic. It's spin. It's a false quality. It's not actually made better, it doesn't hold up better, it's not more sturdy, there's no added structural features, it doesn't upgrade the appearance. All it does is weigh more. That's it. Lol
Sturdiness is not weight. Carbon fiber is one of the sturdiest materials on the planet. Lighter then plastic. But it feels like plastic when it's raw. DC isn't sturdier. Actually it will cause failure of the figure faster compared to plastic Becuase it doesn't hold its surface as well and adds stress to joints.
Rubber bodies weigh more then plastic. And actually look better so they have an advantage DC does not vs plastic. But I don't see the argument being made that rubber is better just Becuase its heavier. It's the exact same principle.