Yes, I am aware that vampires don't actually exist, and they can be made to be whatever they want, etc.
All I am saying is, you become a "vampire" who doesn't drink blood, which is the entire stigma about vampires to begin with. People are afraid of vampires "because" they drink blood, not because they don't.
The main point I have here is, why become a vampire, if I don't have to act like a vampire in order to enjoy the fun of being a vampire. "Vampires" in this game seem to really just be necromancers who can't go out in the sun. Essentially, if you act like a vampire and drink blood, you become human, if you act like a human and don't drink blood, you become a necromancer. It's stupid. Just sayin.
I also think that if you want your vampire powers and people to treat you normally, you should have to work for it and go out and get your vampire potion (fresh blood), instead of just waiting for a few days. Seriously, anyone making the "It would be too easy and break the game" argument are morons if you think that "waiting a few days" isn't already too easy and game breaking.

I drink some blood, fast travel to dungeon, "wait" for a few days inside the entrance, and then go on a rampage. Yeah, that's not broken.
On the flip side, if I had to drink blood in order to get my powers, I would have to feed before entering the dungeon, and then my powers dwindle the longer I stay there, if there is no source of suitable blood to feed on in the dungeon.
You can make all the excuses you want about why they did it this way, all I am saying is "vampires" who don't drink blood aren't vampires.