Last time I checked, vampires are fictional. That means there's no reality to emulate, nothing that a vampire actually "represents."
Nothing, except for everything that Bethesda has already established.
Every major story about a vampire is different from all the others in some way or another. Would you like it if vampires in TES could turn into bats, just because some lore out there says they can?
Sure, why not? But what does that have to do with anything?
No. That's not how fictional fantasy creatures work. Every major story that uses the theme of "vampire" gets to come up with their own theory of how the mechanics work. That is, in fact, why such things are so endearing over the centuries, each new culture and generation can adjust the lore however they like.
And I find the way it's being adjusted now irritating, counter-intuitive, and unfun.
If you think the vampires in TES are sub-par because they aren't like... "normal vampires" or something, I'd challenge you to find consistent evidence that there is such a thing as a "normal vampire" in the first place.
If you think that my argument is anything even close to that, then you haven't taken the time to read more than half of my posts on the subject.