unless you are talking about the Masterpiece, the generic transformers toy are just generic toy.
I regard Yamato valkyrie toys as pre-assembled and highly articulated model more than a toy. The yamato valkyrie is much more sturdier and solid then any model kit, but they are not as robust as most generic toy. People who never deal with model kits before will find them very fragile.
It's like the 1/72 Bandai HCM valkyrie and 1/55 valkyrie toy. HCM as what it called, High Complete Model, these are much more fragile than the 1/55 toy and HCM were aimed for adult collectors.
When you have more articulation joints, more parts to make it anime accurate, it's going to be fragile.
If you have built the 1/72 scale Imai complete 3 modes transformable VF-1 valkyrie kits, you will find out that the shoulder hinge is much more fragile.
I bet Yamato could make their toys more robust by sacrificing articulation on shoulder and reinforce hip joints with swing bar, but will you bite that?