That's IGA for you
not gonna happen, he doesn't even know what to do with his own stories. I think the old canon lost any chance of good storytelling looong ago.
No, that's Konami for you. Before IGA, the background information was just as scarce. Even more so, actually.
And it's not even a flat out flaw, actually. Castlevania has simply stuck to that style of keeping baddies and heroes straightforward. A product of the time when video game characters didn't need that much details. It hasn't been terribly jarring, because lots of things in CV have been left ambiguous or for the imagination. And let's not forget all the tidbits the original, Japanese materials contain. The good side is it's better to have blank spots to fill than smudged details to constantly cross over *looks at Metal Gear*
Anyway. Now, especially now, when the original canon is an endangered species, I wouldn't mind knowing more relatable stuff about the characters. We know almost too much about Gabriel and all too little about Mathias and the Belmonts.