system
Given the following post, respond as if you're commenting on Reddit:
human
[Blade] Why don't vampires who need a daywalker for their sacrifices and experiments just make their own instead of trying to catch Blade?

Blade tells pretty much everyone within earshot about his mother being attacked when he was in the womb.  It's probably common knowledge within the vampire community by now.

So why not just capture a bunch of pregnant women, turn them into vampires, and then reap their daywalker progeny for your twisted blood rituals?  Seems easier than going up against a superpowered guy with swords whose sole mission in his immortal life is to kill you.
gpt
I always assumed that Blade was just an aberration.  Like a one in a million chance. Maybe in the past or repeated attempts  after Blade was born, they found that the human fetus and/or pregnant woman was never strong and capable enough to carry to term.