Don't they require 1 blood point per month per ghoul, and provide 1 pint every 8 weeks/2 months safely (human normal)? It turns out 1/10 of your blood is a lot to lose.
I think they also nerfed the drinking from animals, so even if you've got the powers that allow you to be around animals without them freaking out and dying from stress/running away, that's a solution that only works at extreme low-level.
If you've got decent level Dominate (3 dots), you can theoretically drink from humans without killing them or them telling anyone. If you don't want them to die, and do do nothing except exist, you only need 56 victims (8 weeks x 7 days) you cycle through to get 1 point per day to avoid starving. There's a reason they wrote that vampires are 1/100,000 people (which...check how many people your city has, and how many vampires there are in the average player group). Presence or other methods of luring people into an alley works similarly until one of the people talks to any of their friends and someone realizes vampires might be real, because it was a recordable attack that someone remembers.
You *can* kill people, but that would violate the masquerade very quickly. Ted Bundy is famous for killing 56-ish people over 16 years. 3 people for year on average, and he's super famous for it. You're supposed to be subtle enough to survive forever.
Again, that's only if you use the rules they wrote, which are terrible. The video games ignore a lot of the rules, which is good.