I know what you mean but what you’ve done is just define two sets of games with varying differences in mechanics. So only WRPGs can assign attributes and JRPGs must have ensemble casts? There are many components of games that can transcend genres. A racing game like Mario Party can have an ensemble cast with unique abilities, A game like Sims can have attribute spending to create a player build. Locking these to genres doesn’t help understand as you suggest but that doesn’t mean we should stop trying.
It’s much easier to used these parts as extra descriptors and even better when you also add perspectives
BG3: An turn based strategy [with complex choice]
Valkyria Chronicles: A turn based strategy [with player recruitment]
Disgaea: An turn based strategy [with unlockable job systems]
Wargroove: A turn based strategy [with resource management systems]
I’d even prefer “Earthbound-inspired RPG” as thats more clear on what I’m going to be playing